火星进入器高空稀薄气动特性

doi:10.7527/S1000-6893.2016.0264

Abstract

Abstract:

Attempt has been made to analyze the aerodynamics of Mars entry vehicles under hypersonic rarefied conditions by simulating the flows around the Mars Science Laboratory. The effect of real gas model on hypersonic rarefied aerodynamics is investigated to obtain the aerodynamic characteristics of the entry capsule. The results show that as the flight altitude increases, rarefaction, shock standoff distance and shock thickness increases, shock intensity is weakened at the same time, and flow contours tend to be more of arc shape. Real gas effect results in compressibility of the windward and expansion of the leeward, and also increase of axial force coefficient, normal force coefficient and pitch moment coefficient. On the other hand, as rarefaction enhances, the axial force coefficient, normal force coefficient and pitch moment coefficient also increases. At the same angle of attack, the pressure center moves forward and static stability decreases as the flight altitude increases.

Key words: Mars, entry vehicle, rarefied, direct simulation Monte Carlo, aerodynamics

CLC Number:

V211.3

HUANG Fei, LYU Junming, CHENG Xiaoli, LI Qi. Aerodynamics of Mars entry vehicles under hypersonic rarefied condition[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(5): 120457-120457.

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Aerodynamics of Mars entry vehicles under hypersonic rarefied condition

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