Труды сотрудников ИВМ СО РАН

[Text] : статья / I.V. Krasnov // JETP. - 1983. - Vol. 58, № 5. - p. 909-914

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Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44

Доп.точки доступа:
Краснов, Игорь Васильевич

[Text] / N.I. Kosarev, N.Y. Shaparev // J. Phys. B-At. Mol. Opt. Phys. - 2011. - Vol. 44, Is. 10. - Ст. 105402, DOI 10.1088/0953-4075/44/10/105402. - Cited References: 9 . - ISSN 0953-4075РУБ Optics + Physics, Atomic, Molecular & Chemical

Аннотация: Imprisonment of resonant radiation in gases on the basis of the numerical solution of the rate balance equation for the excited atoms and the transfer resonant radiation equation is investigated. Calculations of the escape factor for the slab, cylinder and sphere at Doppler and Lorentz forms of absorption and scattering profiles are executed. Calculation results of the escape factor for the cylinder and slab are compared with Holsten's asymptotical solutions. The numerical data for time dependence of a spectrum, the intensity of resonant radiation and the spatial distribution of the excited atomic concentration in a regime of afterglow are also considered.


Доп.точки доступа:
Shaparev, N.Ya.; Шапарев, Николай Якимович; Косарев Н.И.

[Text] / T. Penza [et al.] // Planet Space Sci. - 2008. - Vol. 56, Is. 9. - P1260-1272, DOI 10.1016/j.pss.2008.04.005. - Cited References: 53 . - ISSN 0032-0633РУБ Astronomy & Astrophysics

Аннотация: We investigate the efficiency of the atmospheric mass loss due to hydrodynamic blow-off over the lifetime of the exoplanet HD209458b by studying numerically its hydrogen wind for host star X-ray and EUV (XUV) fluxes between 1 and 100 times that of the present Sun. We apply a time-dependent numerical algorithm which is able to solve the system of hydrodynamic equations straight through the transonic point of the flow including Roche lobe effects. The mass loss rates are calculated as functions of the absorbed energy in the thermosphere. Depending on the heating efficiency for a hydrogen-rich thermosphere the maximum temperature obtained in our study at 1.5R(p1) by neglecting IR cooling is about 5000-10,000 K for heating efficiencies of 10% and 60%, respectively. We find that the upper atmosphere of HD209458b experiences hydrodynamic blow-off even at such low temperatures if one does not neglect gravitational effects caused by the proximity of the planet to its Roche lobe boundary. Depending on the heating efficiency, we find from the solution of the hydrodynamic equations of mass, momentum, and energy balance that energy-limited mass loss rate estimations overestimate the realistic mass loss rate at present time for HD209458b by several times. Using the maximum heating efficiency for hydrogen-rich atmospheres of 60% we find that HD209458b may experience an atmospheric mass loss rate at present time of about 3.5 x 10(10) g s(-1). The mass loss rate evolves to higher values for higher XUV fluxes expected during the early period of the planet's host star evolution, reaching values of several times 10(12) gs(-1). The integrated mass loss is found to be between 1.8% and 4.4% of the present mass of HD209458b. We found that the influence of the stellar tidal forces on atmospheric loss (the Roche lobe effect) is not significant at 0.045 AU. For a similar exoplanet, but at closer orbital distances <= 0.02 AU, the combined effect of the Roche lobe and the high XUV radiation result in much higher thermal loss rates of about 2.6 x 10(11) g s(-1) and even more for early stages. This leads to a total loss over 4 Gyr of 27.5% of the planetary mass. (c) 2008 Elsevier Ltd. All rights reserved.

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Доп.точки доступа:
Penza, T.; Erkaev, N.V.; Еркаев, Николай Васильевич; Kulikov, Y.N.; Langmayr, D.; Lammer, H.; Micela, G.; Cecchi-Pestellini, C.; Biernat, H.K.; Selsis, F.; Barge, P.; Deleuil, M.; Leger, A.

[Text] / N. V. Erkaev [et al.] // Astron. Astrophys. - 2007. - Vol. 472, Is. 1. - P329-334, DOI 10.1051/0004-6361:20066929. - Cited References: 26 . - ISSN 0004-6361РУБ Astronomy & Astrophysics

Аннотация: Context. A study of the mass loss enhancement for very close "Hot Jupiters" due to the gravitational field of the host star is presented. Aims. The influence of the proximity to a planet of the Roche lobe boundary on the critical temperature for blow-off conditions for estimating the increase of the mass loss rate through hydrodynamic blow-off for close-in exoplanets is investigated. Methods. We consider the gravitational potential for a star and a planet along the line that joins their mass centers and the energy balance equation for an evaporating planetary atmosphere including the effect of the stellar tidal force on atmospheric escape. Results. By studying the effect of the Roche lobe on the atmospheric loss from short-periodic gas giants we derived reasonably accurate approximate formulas to estimate atmospheric loss enhancement due to the action of tidal forces on a "Hot Jupiter" and to calculate the critical temperature for the onset of "geometrical blow-off", which are valid for any physical values of the Roche lobe radial distance. Using these formulas, we found that the stellar tidal forces can enhance the hydrodynamic evaporation rate from TreS-1 and OGLE-TR-56b by about 2 fold, while for HD 209458b we found an enhancement of about 50%. For similar exoplanets which are closer to their host star than OGLE-TR-56b, the mass loss enhancement can be even larger. Moreover, we showed that the effect of the Roche lobe allows "Hot Jupiters" to reach blow-off conditions at temperatures which are less than expected due to the stellar X-ray and EUV heating.


Доп.точки доступа:
Erkaev, N.V.; Еркаев, Николай Васильевич; Kulikov, Y.N.; Lammer, H.; Selsis, F.; Langmayr, D.; Jaritz, G.F.; Biernat, H.K.

[Text] : статья / Y. Gaponenko, A. Mialdun, V. Shevtsova // The European Physical Journal Special Topics. - 2011. - Vol. 192, Iss. 1. - p. 63-70, DOI 10.1140/epjst/e2011-01360-0 . - ISSN 1951-6355
Аннотация: We report the results of numerical and experimental studies of two-phase flows in an annulus. The geometry corresponds to a cylindrical liquid column co-axially placed into an outer cylinder with solid walls. Gas enters into the annular duct and entrains the initially quiescent liquid. The internal column consists of solid rods at the bottom and top, while the central part is a liquid bridge from a viscous liquid and kept in its position by surface tension. Silicone oil 5cSt was used as a test liquid and air and nitrogen as gases. An original numerical approach was developed to study the problem in complex geometry. The flow structure in the liquid is analyzed for a wide range of gas flow rates.

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Доп.точки доступа:
Mialdun, A.; Shevtsova, V.; Гапоненко, Юрий Анатольевич

/ I. V. Krasnov, N. Ya. Shaparev // Optics Communications. - 1980. - Vol. 34, Is. 1. - P68-70 . - ISSN 0030-4018
Аннотация: The translational nonequilibrium of the resonance impure gas in a field of a traveling electromagnetic wave produced by both the radiation pressure and the difference in cross-sections of elastic collisions between the excited- and ground-state atoms and a buffer gas has been studied. В© 1980.

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Держатели документа:
Computing Centre, the Siberian Branch, the USSR, Krasnoyarsk, USSR 660049, Russian Federation
ИВМ СО РАН

Доп.точки доступа:
Krasnov, I.V.; Краснов, Игорь Васильевич; Shaparev, N.Ya.; Шапарев, Николай Якимович

/ A. P. Gavriluk, N. Ya. Shaparev // Opt. Commun. - 1981. - Vol. 39, Is. 6. - P379-382, DOI 10.1016/0030-4018(81)90227-3. - Cited References: 11 . - ISSN 0030-4018РУБ Optics

Аннотация: The propagation of the resonance electromagnetic wave accompanied by gas ionization is considered. Plasma is formed through initial associative processes followed by the action of electrons which gain energy when colliding with the excited atoms. The change in the nature of the radiation propagation results from both a decrease in the ground state atom density and an increase in the probability of the upper state atom de-excitation. Concrete estimates are made for cesium. The degree of gas ionization and the wave propagation velocity of transparency are calculated. В© 1981.

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Держатели документа:
Computing Center of the Siberian Branch of the USSR, Academy of Sciences, Krasnoyarsk, USSR, 660049
ИВМ СО РАН

Доп.точки доступа:
GAVRILUK, A.P.; Гаврилюк, Анатолий Петрович; Shaparev, N.Ya.; Шапарев, Николай Якимович

/ A. P. Gavrilyuk // Teplofizika Vysokikh Temperatur. - 1995. - Vol. 33, Is. 1. - P144-146 . - ISSN 0040-3644
Аннотация: The paper assesses coefficients and rates of ionization caused by an electron shock of atomic gas. It is meant that this gas is excited by resonance radiation and that ionization rate depends on the tune out of radiation frequency from the center of absorption line. It has been shown that in the central part of the line, where saturation is implemented, the coefficient depends only on characteristics of the resonance transition and ionization potential of the atom, and that the growth of electron concentration in time is exponential. When the far end of the line is tuned out, saturation disappears and dynamics of concentration growth becomes nonlinear.

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Держатели документа:
VTs SO RAN, Krasnoyarsk, Russian Federation
ИВМ СО РАН

Доп.точки доступа:
Gavrilyuk, A.P.; Гаврилюк, Анатолий Петрович

[Text] / E. N. Vasil'ev // Tech. Phys. - 2014. - Vol. 59, Is. 12. - P1775-1779, DOI 10.1134/S1063784214120287. - Cited References: 12 . - ISSN 1063-7842. - ISSN 1090-6525РУБ Physics, Applied

Аннотация: The temperature, electric field strength, and specific and integrated powers of energy mechanisms of an axisymmetric steady-state equilibrium arc discharge in hydrogen and helium under atmospheric pressure are calculated for various values of the current and radius. The results of calculations are presented in the form of state diagrams intended for estimating the main energy characteristics of electric arcs.

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Держатели документа:
Russian Acad Sci, Inst Computat Modeling, Siberian Branch, Krasnoyarsk 660036, Russia
ИВМ СО РАН

Доп.точки доступа:
Vasil'ev, E.N.; Васильев, Евгений Николаевич

/ P. Belolipetsky [et al.] // Asia Pac. J. Atmos. Sci. - 2015. - Vol. 51, Is. 4. - P323-330, DOI 10.1007/s13143-015-0081-6 . - ISSN 1976-7633
Аннотация: In this study we used HadCRUT4 monthly mean near surface temperature anomalies for 1950–2014 years in order to investigate properties of recent warming. Our aim was to separate changes produced by short-term natural variations and to look on temporal and spatial dynamics of residual temperature anomalies. For this we subtract linear influence of El Nino Southern Oscillation from each grid box of surface temperature measurements. We found that residual global temperature dynamics looks like staircase function: linear trends for three quasi-stable periods 1950–1987, 1988–1997 and 1998–2014 are near zero and near all warming occurred during two shifts of 1987/1988 and 1997/1998 years. Examples of similar staircase behavior of some climate parameters were found in NCEP/NCAR and NASA MERRA reanalysis data. Staircase signal suggests the existence of some regulation mechanism in climate system. This mechanism should maintain global temperature adjusted for El Nino Southern Oscillation near stable in 1950–1987, 1988–1997 and 1998–2014 periods nevertheless all the time growing forcing due to anthropogenic greenhouse gases. © 2015, Korean Meteorological Society and Springer Science+Business Media Dordrecht.

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Держатели документа:
Institute of Computational Modelling, SB RAS, Akademgorodok 50/44, Krasnoyarsk, Russian Federation
Institute of Biophysics, SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belolipetsky, P.V.; Белолипецкий, Павел Викторович; Bartsev, S.; Ivanova, Y.; Saltykov, M.
Свободных экз. нет

/ V. B. Bekezhanova, O. N. Goncharova // Fluid Dyn. Res. - 2016. - Vol. 48, Is. 6, DOI 10.1088/0169-5983/48/6/061408 . - ISSN 0169-5983
Аннотация: A new exact solution of the equations of free convection has been constructed in the framework of the Oberbeck-Boussinesq approximation of the Navier-Stokes equations. The solution describes the joint flow of an evaporating viscous heat-conducting liquid and gas-vapor mixture in a horizontal channel. In the gas phase the Dufour and Soret effects are taken into account. The consideration of the exact solution allows one to describe different classes of flows depending on the values of the problem parameters and boundary conditions for the vapor concentration. A classification of solutions and results of the solution analysis are presented. The effects of the external disturbing influences (of the liquid flow rates and longitudinal gradients of temperature on the channel walls) on the stability characteristics have been numerically studied for the system HFE7100-nitrogen in the common case, when the longitudinal temperature gradients on the boundaries of the channel are not equal. In the system both monotonic and oscillatory modes can be formed, which damp or grow depending on the values of the initial perturbations, flow rates and temperature gradients. Hydrodynamic perturbations are most dangerous under large gas flow rates. The increasing oscillatory perturbations are developed due to the thermocapillary effect under large longitudinal gradients of temperature. The typical forms of the disturbances are shown. © 2016 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.

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Держатели документа:
Institute of Computational Modelling SB RAS, 50/44 Krasnoyarsk, Akademgorodok, Russian Federation
Institute of Mathematics and Computer Science, Siberian Federal University, Svobodny 79, Krasnoyarsk, Russian Federation
Altai State University, Lenina 61, Barnaul, Russian Federation
Institute of Thermophysics, SB RAS, Lavrentyev 1, Novosibirsk, Russian Federation

Доп.точки доступа:
Bekezhanova, V. B.; Goncharova, O. N.

/ V. Shaydurov, G. Shchepanovskaya, M. Yakubovich // (15 June 2016 through 22 June 2016 : Springer Verlag, 2017. - Vol. 10187 LNCS. - P119-131, DOI 10.1007/978-3-319-57099-0_11 . -
Аннотация: In the paper, a mathematical model is proposed for the modeling of the complex of phenomena which accompany the passage of a friable asteroid-comet body through the Earth’s atmosphere: the material ablation, the dissociation of molecules, and the ionization. The model is constructed on the basis of the time-dependent Navier-Stokes equations for viscous heat-conducting gas with an additional equation for the propagation of friable lumpy-dust material in air. A numerical algorithm is proposed for solving the formulated initial boundary-value problem as the combination of the semi-Lagrangian approximation for Lagrange transport derivatives and the conforming finite element method for other terms. A numerical example illustrates these approaches. © Springer International Publishing AG 2017.

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Держатели документа:
Institute of Computational Modeling of Siberian Branch of Russian Academy of Sciences, 50/44 Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Shchepanovskaya, G.I.; Щепановская, Галина Ивановна; Yakubovich, M.V.; Якубович, Максим Викторович; Шайдуров, Владимир Викторович

/ V. B. Bekezhanova, O. N. Goncharova // J. Phys. Conf. Ser. - 2017. - Vol. 899, Is. 3, DOI 10.1088/1742-6596/899/3/032006 . - ISSN 1742-6588
Аннотация: The solution of special type of the Boussinesq approximation of the Navier - Stokes equations is used to simulate the two-layer evaporative fluid flows. This solution is the 3D generalization of the Ostroumov - Birikh solution of the equations of free convection. Modeling of the 3D fluid flows is performed in an infinite channel of the rectangular cross section without assumption of the axis-symmetrical character of the flows. Influence of gravity and evaporation on the dynamic and thermal phenomena in the system is studied. The fluid flow patterns are determined by various thermal, mechanical and structural effects. Numerical investigations are performed for the liquid - gas system like ethanol - nitrogen and HFE-7100 - nitrogen under conditions of normal and low gravity. The solution allows one to describe a formation of the thermocapillary rolls and multi-vortex structures in the system. Alteration of topology and character of the flows takes place with change of the intensity of the applied thermal load, thermophysical properties of working media and gravity action. Flows with translational, translational-rotational or partially reverse motion can be formed in the system. © Published under licence by IOP Publishing Ltd.

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Держатели документа:
Institute of Computational Modeling SB RAS, Academgorodok 50/44, Krasnoyarsk, Russian Federation
Institute of Thermophysics SB RAS, Ac. Lavrentieva ave 1, Novosibirsk, Russian Federation
Altai State University, pr Lenina 61, Barnaul, Russian Federation

Доп.точки доступа:
Bekezhanova, V. B.; Goncharova, O. N.

/ V. B. Bekezhanova, O. N. Goncharova // Int. J. Therm. Sci. - 2018. - Vol. 130. - P323-332, DOI 10.1016/j.ijthermalsci.2018.05.001 . - ISSN 1290-0729
Аннотация: The exact solution for the Boussinesq approximation of the Navier – Stokes equations is analytically constructed to describe the joint flow of an evaporating viscous heat-conducting liquid and gas-vapor mixture in an infinite horizontal channel. The effects of thermodiffusion and diffusive heat conductivity in the gas-vapor phase are additionally taken into account in the governing equations and interface conditions. Possible flow types are classified with respect to the types of the boundary conditions for the vapor concentration on the upper solid wall of the channel. The importance of a solution of special type is that it gives a possibility to specify on the qualitative level the physical factors defining the basic flow mechanisms. The constructed solution has the group nature and allows one to describe the real flow regimes and a formation of patterns observed in the experiments. It describes three classes of flows: pure thermocapillary, mixed and Poiseuille flows according to the dominant force or interaction of effects. The stability of the two-layer flows of the liquid and gas-vapor phase is investigated for the equal values of the longitudinal temperature gradients on the channel walls. In this case the perturbations of the basic flow can lead to the formation of the vortex and thermocapillary structures. The influence of the thermal load intensity and gas flow rate on the type of the arising instability is studied. The evolution of the perturbations is investigated numerically. © 2018 Elsevier Masson SAS

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Держатели документа:
Institute of Computational Modeling SB RAS, Akademgorodok 50/44, Krasnoyarsk, Russian Federation
Altai State University, pr Lenina 61, Barnaul, Russian Federation
Institute of Thermophysics SB RAS, Ac. Lavrentieva ave 1, Novosibirsk, Russian Federation

Доп.точки доступа:
Bekezhanova, V. B.; Goncharova, O. N.

/ P. Odert [et al.] // Icarus. - 2018. - Vol. 307. - P327-346, DOI 10.1016/j.icarus.2017.10.031. - Cited References:136. - PO and HL acknowledge support from the Austrian Science Fund (FWF): P27256-N27. NVE acknowledges RFBR grant No 16-52-14006 ANF_a. AN and NT acknowledge support from the Helmholtz Association (project VH-NG-1017). This work was supported by the FWF NFN project S11601-N16 'Pathways to Habitability: From Disks to Active Stars, Planets and Life' and the related subprojects S11604-N16 and S11607-N16. The authors also acknowledge the International Space Science Institute (ISSI, Bern, Switzerland) and the ISSI team 'The Early Evolution of the Atmospheres of Earth, Venus, and Mars'. We thank the two anonymous referees for helpful comments which significantly improved the paper. . - ISSN 0019-1035. - ISSN 1090-2643РУБ Astronomy & Astrophysics

Аннотация: Planetary embryos form protoplanets via mutual collisions, which can lead to the development of magma oceans. During their solidification, significant amounts of the mantles' volatile contents may be outgassed. The resulting H2O/CO2 dominated steam atmospheres may be lost efficiently via hydrodynamic escape due to the low gravity of these Moon- to Mars-sized objects and the high stellar EUV luminosities of the young host stars. Protoplanets forming from such degassed building blocks after nebula dissipation could therefore be drier than previously expected. We model the outgassing and subsequent hydrodynamic escape of steam atmospheres from such embryos. The efficient outflow of H drags along heavier species like O, CO2, and noble gases. The full range of possible EUV evolution tracks of a young solar-mass star is taken into account to investigate the atmospheric escape from Mars-sized planetary embryos at different orbital distances. The estimated envelopes are typically lost within a few to a few tens of Myr. Furthermore, we study the influence on protoplanetary evolution, exemplified by Venus. In particular, we investigate different early evolution scenarios and constrain realistic cases by comparing modeled noble gas isotope ratios with present observations. Isotope ratios of Ne and Ar can be reproduced, starting from solar values, under hydrodynamic escape conditions. Solutions can be found for different solar EUV histories, as well as assumptions about the initial atmosphere, assuming either a pure steam atmosphere or a mixture with accreted hydrogen from the protoplanetary nebula. Our results generally favor an early accretion scenario with a small amount of residual hydrogen from the protoplanetary nebula and a low-activity Sun, because in other cases too much CO2 is lost during evolution, which is inconsistent with Venus' present atmosphere. Important issues are likely the time at which the initial steam atmosphere is outgassed and/or the amount of CO2 which may still be delivered at later evolutionary stages. A late accretion scenario can only reproduce present isotope ratios for a highly active young Sun, but then unrealistically massive steam atmospheres (few kbar) would be required. (C) 2017 Elsevier Inc. All rights reserved.

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Держатели документа:
Austrian Acad Sci, Space Res Inst, Schmiedlstr 6, A-8042 Graz, Austria.
Russian Acad Sci, Siberian Branch, Inst Computat Modelling, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
German Aerosp Ctr DLR, Inst Planetary Res, Rutherfordstr 2, D-12489 Berlin, Germany.
Tech Univ Berlin, Str 17 Juni 135, D-10623 Berlin, Germany.
Univ Vienna, Dept Astrophys, Turkenschanzstr 17, A-1180 Vienna, Austria.
Karl Franzens Univ Graz, IGAM, Inst Phys, Univ Pl 5, A-8010 Graz, Austria.

Доп.точки доступа:
Odert, P.; Lammer, H.; Erkaev, N. V.; Nikolaou, A.; Lichtenegger, H. I. M.; Johnstone, C. P.; Kislyakova, K. G.; Leitzinger, N.; Tosi, N.; Nikolaou, Athanasia; Austrian Science Fund (FWF) [P27256-N27]; RFBR [16-52-14006 ANF_a]; Helmholtz Association [VH-NG-1017]; FWF NFN [S11601-N16, S11604-N16, S11607-N16]

/ V. B. Bekezhanova, O. N. Goncharova // Appl. Math. Model. - 2018. - Vol. 62. - P145-162, DOI 10.1016/j.apm.2018.05.021 . - ISSN 0307-904X
Аннотация: Theoretical and numerical study of the convection processes, which are accompanied by evaporation/condensation, in the framework of new non-standard problem is largely motivated by new physical experiments. One of the principal questions is to understand the character and to evaluate the degree of influence of particular factors or their combined action on the structure of the joint flows of liquid and gas-vapor mixture. The flow topology is determined by four main mechanisms: natural and thermocapillary convection, tangential stresses and mass transfer due to evaporation at the interface. The mathematical modeling of the fluid flows in an infinite channel with a rectangular cross section is carried out on the basis of the solution of a special type of the convection equations. The effects of thermodiffusion and diffusive thermal conductivity in the gas phase and evaporation at the thermocapillary interface are taken into consideration. Numerical investigations are performed for the liquid – gas (ethanol – nitrogen) system under normal and low gravity. The fluid flows are characterized as translational and progressively rotational motions and can be realized in various forms. © 2018 Elsevier Inc.

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Держатели документа:
Institute of Computational Modeling SB RAS, Akademgorodok 50/44, Krasnoyarsk, Russian Federation
Institute of Thermophysics SB RAS, Ac. Lavrentieva ave 1, Novosibirsk, Russian Federation
Altai State University, pr Lenina 61, Barnaul, Russian Federation

Доп.точки доступа:
Bekezhanova, V. B.; Goncharova, O. N.

[Текст] / Олег Георгиевич Шишканов [и др.] ; патентообладатель Учреждение Российской академии наук Институт вычислительного моделирования Сибирского отделения Российской академии наук (ИВМ СО РАН) ; Опубл. 15.06.2011 ; МПК 2460939. - [Б. м. : б. и.], 2012
Перевод заглавия: OPERATING METHOD OF TANGENTIAL FURNACE
   Перевод заглавия: OPERATING METHOD OF TANGENTIAL FURNACE
Аннотация: <p num="36">Изобретение относится к теплоэнергетике и может быть использовано в топках паровых котлов при сжигании шлакующих углей. Способ работы тангенциальной топки с угловым многоярусным блочным расположением горелок, ориентированных по касательной к условной окружности, путем подачи в последние равного расхода топливно-воздушной смеси и газов рециркуляции при отключении блока горелок, расходы топливно-воздушной смеси и газов рециркуляции, подаваемых в блоки горелок, устанавливают в соответствии с зависимостями:</p> <p num="37">B_i=(0,4684-0,045i)B, i=2, 3, 4;</p> <p num="38">r_i=(0,0267i³-0,250i²+0,8033i-0,5507)r, i=1, 2, 3, 4,</p> <p num="39">где</p> <p num="40">i - номер горелочного блока, начиная счет с отключенного (для которого принимается B₁=0) по ходу движения газов;</p> <p num="41">В_i - расход топливно-воздушной смеси, подаваемой в i-й горелочный блок;</p> <p num="42">r_i - расход газов рециркуляции, подаваемых в i-й горелочный блок;</p> <p num="43">В - общий расход топливно-воздушной смеси, подаваемой в топку;</p> <p num="44">r - общий расход газов рециркуляции, подаваемых в топку. Изобретение позволяет повысить качество сжигания топлива и эксплуатационную надежность путем устранения температурной неравномерности в зоне активного горения и предотвращения шлакования экранных поверхностей нагрева при отключении блока горелок. 2 ил.<img src="/get_item_image.asp?id=37497630&img=00000001.TIF" class="img_big"></p>
<p num="45">FIELD: power industry.</p> <p num="46">SUBSTANCE: method of tangential furnace with angular multi-tier modular location of burners oriented at a tangent to conditional circle by supplying to the above burners the equal flow of fuel-air mixture and recirculation gases; at cut-out of burner assembly the flows of fuel-air mixture and recirculation gases, which are supplied to burner assemblies, are specified in compliance with the following relationships: B_i=(0.4684-0.045i)B, i=2, 3, 4; r_i=0.0267i³-0.250i²+0.8033i-0.5507)r, i=1, 2, 3,4, where i - burner assembly number starting from the one that is cut-out (for which B₁=0) in gas flow direction; B_i - fuel-air mixture flow supplied to i burner assembly; r_i; - recirculation gas flow supplied to i burner assembly; B - total fuel-air mixture flow supplied to the furnace; r - recirculation gas flow supplied to the furnace.</p> <p num="47">EFFECT: invention allows improving fuel combustion quality and operating reliability by eliminating the temperature unevenness in active combustion zone and by preventing the slagging of water wall heating surfaces at cut-out of burner assembly.</p> <p num="48">2 dwg </p>

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Учреждение Российской академии наук Институт вычислительного моделирования Сибирского отделения Российской академии наук (ИВМ СО РАН)

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Шишканов, Олег Георгиевич; Shishkanov Oleg Georgievich; Каменщиков, Леонид Петрович; Kamenshchikov Leonid Petrovich; Андруняк, Ирина Васильевна; Andrunjak Irina Vasil'evna; Зырянов, Игорь Васильевич; Zyrjanov Igor' Vasil'evich; Учреждение Российской академии наук Институт вычислительного моделирования Сибирского отделения Российской академии наук (ИВМ СО РАН)
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/ A. S. Fedotova [et al.] // IOP Conference Series: Earth and Environmental Science : Institute of Physics Publishing, 2019. - Vol. 315: International Scientific Conference on Agribusiness, Environmental Engineering and Biotechnologies, AGRITECH 2019 (20 June 2019 through 22 June 2019, ) Conference code: 152072, Is. 4. - Ст. 042017, DOI 10.1088/1755-1315/315/4/042017 . -
Аннотация: The article contains the results of hematological, immunological and chemiluminescent analysis of the functional activity of peripheral blood cells of five-year-old lactating cows from the central regions of the Krasnoyarsk Territory (Siberia, Russia) with different radiation status, at which the radiation doses of animals were 0.02, 0.17 and 0.21 mSv per year. It was established that small doses of radiation at 0.17 mSv per year and 0.21 mSv per year affect hematological parameters, increase the phagocytic activity of blood leukocytes and change the kinetics of the formation of active oxygen forms by blood cells, which is manifested as an increase in the time of formation of the maximum kinetics of spontaneous and activated secondary radicals, reduction of the total production of secondary radicals in the antigenic activation of blood cells in vitro and an increase in the volume of spontaneously produced primary radicals. © 2019 IOP Publishing Ltd. All rights reserved.

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Держатели документа:
Krasnoyarsk State Agrarian University, 90 Mira ane., Krasnoyarsk, 660049, Russian Federation
Institute of Computational Modeling SB RAS, 50/44 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
ISC Research Center for Extreme States of the Body at the Presidium of the FIC KSC SB RAS, 50/12 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Fedotova, A. S.; Turitsina, E. G.; Makarskaya, G. V.; Tarskikh, S. V.

/ E. N. Vasil’ev, D. A. Nesterov // High Temp. - 2019. - Vol. 57, Is. 5. - P603-608, DOI 10.1134/S0018151X19050183 . - ISSN 0018-151X
Аннотация: Abstract: Numerical simulation of the interaction of the current layer in the magneto-gasdynamic channel with the induction of external magnetic fields of 1, 2, and 4 T and various load resistance values has been carried out. Features of the energy balance and differences in the temperature profiles in the current layers, which were both streamlined by a nonconducting gas flow and completely covered the channel cross section and interacted with the flow like a piston, are revealed. The dependences on the load resistance are obtained for the current, coefficients of current-layer permeability, and enthalpy conversion. © 2019, Pleiades Publishing, Ltd.

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Держатели документа:
Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Vasil’ev, E. N.; Nesterov, D. A.

/ H. Lammer, M. Leitzinger, M. Scherf [et al.] // Icarus. - 2020. - Vol. 339. - Ст. 113551, DOI 10.1016/j.icarus.2019.113551 . - ISSN 0019-1035
Аннотация: The atmospheric noble gas isotope and elemental bulk ratios on Venus and Earth provide important information on their origin and evolution. If the protoplanets grew to a certain mass (i.e. > 0.5 MEarth), they could have captured H2-dominated primordial atmospheres by accreting gas from the circumstellar disk during the formation of the Solar System, which were then quickly lost by hydrodynamic escape after the disk dissipated. In such a case, the EUV-driven hydrodynamic flow of H atoms dragged heavier elements with it at different rates, leading to changes in their initial isotope ratios. For reproducing Earth and Venus present atmospheric 36Ar/38Ar, 20Ne/22Ne, 36Ar/22Ne, isotope and bulk K/U ratios we applied hydrodynamic upper atmosphere escape and Smooth Particle Hydrodynamics (SPH) impact models for the loss calculations of captured H2-dominated primordial atmospheres for various protoplanetary masses. We investigated a wide range of possible EUV evolution tracks of the young Sun and initial atmospheric compositions based on mixtures of captured nebula gas, outgassed and delivered material from ureilite, enstatite and carbonaceaous chondrites. Depending on the disk lifetime of ? 3–5 Myr (Bollard et al., 2017; Wang et al., 2017) and the composition of accreted material after disk dispersal, we find from the reproduction of the present atmospheric Ar, Ne, and bulk K/U ratios, that early Earth's evolution can be explained if proto-Earth had accreted masses between ? 0.53 ? 0.58 MEarth by the time the nebula gas dissipated. If proto-Earth would have accreted a higher mass during the disk lifetime the present atmospheric Ar and Ne isotope ratios can not be reproduced with our model approach. For masses > 0.75 MEarth, Earth would have had a problem to get get rid of its primordial atmosphere. If proto-Earth accreted ? 0.53 ? 0.58MEarth of enstatite-dominated material as suggested by Dauphas (2017) during the disk lifetime, it would have captured a tiny primordial atmosphere that was lost ? 3 Myr after the disk dissipated. In such a case we find that the present-day atmospheric Ar and Ne isotope ratios can be best reproduced if the post-nebula impactors contained ? 5% weakly depleted carbonaceous chondritic material and ? 95% enstatite chondrites that are strongly depleted in Ar, Ne and moderately volatile elements like potassium. If higher amounts of carbonaceous chondrites were involved in early Earth's accretion as recently suggested by Schiller et al. (2018), then the Earth's present atmospheric Ar and Ne ratios can only be reproduced if the involved carbonaceous chondritic post-nebula material was also highly depleted in these noble gases and/or had to be partially be delivered as long as the primordial atmosphere was yet escaping. As long as primordial atmospheres surround the growing protoplanets the abundance of their volatile elements is overwritten by their respective captured solar-like atmospheric abundances. Therefore the initial composition of the protoplanets at the disk dispersal time can not be identified by our method. For masses < 0.5 MEarth atmospheric escape cannot explain the present-day ratios, i.e. if Earth grew slower then these ratios have to be explained differently (Marty, 2012). If proto-Venus captured a primordial atmosphere it should have grown to masses of ? 0.85? 1.0 MVenus during the time until the disk dissipated and if early Venus accreted its main mass during the disk lifetime than the present atmospheric Ar and Ne isotope ratios and the observed K/U ratios on Venus surface can also be reproduced by the escape of a captured primordial atmosphere that is lost within ? 100 Myr, if the Sun was born as a weakly to moderately active young G star. New precise re-measurements of atmospheric noble gases are necessary by future Venus missions to better constrain the material that was involved in the planet's accretion history and possibly also the EUV activity evolution of the young Sun. In addition, measurements of other moderately volatile element and isotope ratios on the surface such as Rb/U, 64Zn/66Zn, and 39K/41K can give an insight on whether Venus accreted slow or fast, i.e. almost to its final mass within the disk lifetime. © 2019 Elsevier Inc.

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Держатели документа:
Space Research Institute, Austrian Academy of Sciences, Graz, Austria
Institute of Physics/IGAM, University of Graz, Austria
Department of Astrophysics, University of Vienna, Austria
Institute of Astronomy and Astrophysics, University of Tubingen, Germany
Institute of Planetary Research, Department of Planetary Physics, DLR, Berlin, Germany
Department of Astronomy and Astrophysics, Berlin Institute of Technology, Germany
Department of Physics, Sapienza University of Rome, Rome, Italy
LATMOS, Universite de Versailles Saint-Quentin-en-Yvelines, Guyancourt, France
Institute of Computational Modelling SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Department of Earth Sciences, Freie Universitat, Berlin, Germany

Доп.точки доступа:
Lammer, H.; Leitzinger, M.; Scherf, M.; Odert, P.; Burger, C.; Kubyshkina, D.; Johnstone, C.; Maindl, T.; Schafer, C. M.; Gudel, M.; Tosi, N.; Nikolaou, A.; Marcq, E.; Erkaev, N. V.; Noack, L.; Kislyakova, K. G.; Fossati, L.; Pilat-Lohinger, E.; Ragossnig, F.; Dorfi, E. A.