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Computation of the radiative heat flux for a reentry vehicle flying in Venus atmosphere. (Russian, English) Zbl 1078.85502

Zh. Vychisl. Mat. Mat. Fiz. 42, No. 5, 718-728 (2002); translation in Comput. Math. Math. Phys. 42, No. 5, 688-698 (2002).
Problems in radiative gas dynamics associated with the flight of a reentry vehicle in the Venusian atmosphere were solved. The flight was implemented through a special ballistic maneuver: the vehicle moved through the upper layers of the atmosphere, left it, and landed on the surface of the planet after the next entry. An analysis of the behavior of the thermal subsystem in various spectral intervals was performed for a one-dimensional model problem. Solutions were obtained for spectral intervals where the computational domain is optically thick. Variants of an algorithm based on transfer of boundary conditions were employed in computations. The computations were performed in a quasi-steady-state approximation for all points of a flight trajectory in the Venusian atmosphere. It is shown that a vehicle of conical geometry has advantages over a segment-shaped one with regard to the maneuver in question.

MSC:

85A25 Radiative transfer in astronomy and astrophysics
80M30 Variational methods applied to problems in thermodynamics and heat transfer
76N15 Gas dynamics (general theory)
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