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传热学
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ISSN 打印: 1064-2285
ISSN 在线: 2162-6561

传热学

DOI: 10.1615/HeatTransRes.v33.i1-2.20
8 pages

Heat Transfer in Separated Hypersonic Gas Flows at Moderate Reynolds Numbers

Ivan Vladimirovich Egorov
Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russian Federation
Alexander Ivanovich Erofeev
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Street, Zhukovsky, Moscow Region, 140180, Russian Federation
Dmitry Valentinovich Ivanov
N. E. Zhukovskii Central Aerodynamic Institute, Zhukovskii, Moscow Region, Russia
V. P. Provotorov
N. E. Zhukovskii Central Aerodynamic Institute, Zhukovskii, Moscow Region, Russia

ABSTRACT

Separated hypersonic flows of rarefied gas over a flat plate with a vertical barrier and over a comer of compression are investigated at Reynolds numbers Re Ј 1.5·104. A kinetic approach (solution of the Boltzmann equation) and a continuum approach (solution of the Navier-Stokes equations (NSE)) are used. It is shown that in solution of the kinetic problem the point of separation is located more downstream, than in the NSE case. When using slipping boundary conditions for NSE the nonmonotonous change in the distribution of heat flux over the surface takes place in the preseparation region of flow; the peak value of the heat flux distribution is more obvious in the solution of the kinetic problem.


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