## Abstract

Various gas-dynamic models for describing chemically non-equilibrium flows are compared using the example of the steady flow past the blunt nose of the "Buran" [1] and "Space Shuttle" vehicles during their descent from orbit. Models of locally self-similar approximations of the Navier-Stokes equations [2], of a chemically equilibrium and non-equilibrium complete viscous shock layer (CVSL) [3] and a model of a thin viscous shock layer (TVSL) [4] are considered. In all the models the occurrence of physicochemical processes was taken into account in the same way using fixed values of the constants for the gas-phase chemical reactions (their effect has been considered in [5]). Good agreement between the results of calculations of the heat flux at the critical point is found. Chemically non-equilibrium flows have been considered earlier using the approximate Navier-Stokes equations [6], within the framework of a TVSL [7] and a CVSL [8, 9](for more detail, see the review [10]). The TVSL and CVSL models were compared in [11] in the case of flows of a uniform gas.

Original language | English |
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Pages (from-to) | 939-944 |

Number of pages | 6 |

Journal | Journal of Applied Mathematics and Mechanics |

Volume | 56 |

Issue number | 6 |

DOIs | |

Publication status | Published - 1992 |

Externally published | Yes |