| 火星科学实验室气动特性数值分析 |
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| 引用本文： | 吕俊明,程晓丽,王强. 火星科学实验室气动特性数值分析[J]. 力学与实践, 2013, 35(1): 31. DOI: 10.6052/1000-0879-12-331 |
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| 作者姓名： | 吕俊明 程晓丽 王强 |
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| 作者单位： | 中国航天空气动力技术研究院,北京 100074 |
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| 摘 要： | 针对火星着陆探测器进入-下降-着陆过程的高超声速进入阶段,求解三维流体动力学Navier-Stokes 方程与化学反应动力学模型,分析火星科学实验室进入火星大气时的化学非平衡效应、探测器周围的流场结构和气动特性在化学非平衡效应影响下的变化. 结果表明,CO2 在激波后大量分解,消耗大量能量;在化学非平衡效应影响下,探测器头部激波脱体距离大幅减小,尾迹旋涡运动减弱;化学非平衡效应影响下探测器升力系数变化不大,阻力系数高于完全气体,升阻比略低,配平攻角小于完全气体.
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| 关 键 词： | 火星大气 高超声速进入 火星科学实验室 化学非平衡 气动特性 |
| 收稿时间： | 2012-02-01 |
NUMERICAL AERODYNAMIC ANALYSIS OF MARS SCIENCE LABORATORY |
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| L,#,Junming,CHENG Xiaoli,WANG Qiang. NUMERICAL AERODYNAMIC ANALYSIS OF MARS SCIENCE LABORATORY[J]. Mechanics and Engineering, 2013, 35(1): 31. DOI: 10.6052/1000-0879-12-331 |
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| Authors: | L&# Junming CHENG Xiaoli WANG Qiang |
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| Affiliation: | China Academy of Aerospace Aerodynamics, Beijing 100074, China |
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| Abstract: | Based on the hypersonic entry in the entry-descending-landing procedure,the three-dimensional Navier-Stokes equations are solved by a parallel code to analyze the flow field structures, the aerodynamic characteristics and their variation patterns of the Mars Science Laboratory entering the Martian atmosphere with and without the chemical reaction models. The analysis shows that a large number of CO2 is dissociated behind the shock and much energy is consumed, with the chemical non-equilibrium effect, the shock layer is strongly compressed. The comparisons between the real gas and the perfect gas show that the vortex in the wake flow is reduced, the positions of the separation lines and the singularity are distinctly different; under the chemical non-equilibrium condition, the lift coefficient almost keeps the same, the drag coefficient increases, the lift-to-drag ratio and the pitch moment are smaller than those of the perfect gas. |
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| Keywords: | martian atmosphere hypersonic entry mars science laboratory chemical non-equilibrium aero- dynamic characteristic |
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