刘庆宗, 董维中, 丁明松, 江涛, 高铁锁. 火星探测器气动热环境和气动力特性的数值模拟研究[J]. 空气动力学学报, 2018, 36(4): 642-650. DOI: 10.7638/kqdlxxb-2016.0053
引用本文: 刘庆宗, 董维中, 丁明松, 江涛, 高铁锁. 火星探测器气动热环境和气动力特性的数值模拟研究[J]. 空气动力学学报, 2018, 36(4): 642-650. DOI: 10.7638/kqdlxxb-2016.0053
LIU Qingzong, DONG Weizhong, DING Mingsong, JIANG Tao, GAO Tiesuo. Numerical simulation of aerothermal environments and aerodynamic characteristics for Mars entry capsules[J]. ACTA AERODYNAMICA SINICA, 2018, 36(4): 642-650. DOI: 10.7638/kqdlxxb-2016.0053
Citation: LIU Qingzong, DONG Weizhong, DING Mingsong, JIANG Tao, GAO Tiesuo. Numerical simulation of aerothermal environments and aerodynamic characteristics for Mars entry capsules[J]. ACTA AERODYNAMICA SINICA, 2018, 36(4): 642-650. DOI: 10.7638/kqdlxxb-2016.0053

火星探测器气动热环境和气动力特性的数值模拟研究

Numerical simulation of aerothermal environments and aerodynamic characteristics for Mars entry capsules

  • 摘要: 针对探测器进入火星大气过程中的高温气体非平衡效应及其气动热环境和气动力特性的精确预测问题,考虑火星大气高温混合气体的化学反应、束缚电子能激发效应、分子振动能激发效应和非平衡效应,以及不同表面催化特性和表面温度条件的影响,建立了数值模拟热化学非平衡流场的计算方法,并通过与平头圆柱试验模型和MESUR火星探测器的试验与计算数据对比分析,验证了计算方法的可行性与有效性,然后对典型火星探测器的气动热环境和气动力特性进行了数值模拟分析。研究结果表明:1)对于本文的计算状态情况,火星探测器流场中化学非平衡效应非常严重,存在一定的热力学非平衡效应;2)热力学模型、化学反应模型和表面催化特性对气动热计算有着重要影响;3)气体模型对气动力特性的预测影响较大,表面温度条件和表面催化特性对气动力系数的计算影响较小。

     

    Abstract: In order to study high-temperature non-equilibrium effects for Mars entry and predict precisely aerothermal environments and aerodynamic characteristics of Mars entry capsules, the numerical methods are developed to simulate the thermo-chemical non-equilibrium flow by considering the chemical reaction, vibrational excitation and thermo-chemical non-equilibrium effects, and surface catalytic and different wall temperature conditions are also taken into account. The methods are validated by comparing the blunt cylinder and MESUR capsule computational results with the corresponding reference and experimental data, and the aerothermal environments and aerodynamic characteristics for typical Mars entry capsules are also studied in this paper by the numerical methods. The results show that:1) under the computational conditions, there are severe chemical non-equilibrium and some thermal non-equilibrium in the flow-fields of Mars entry capsules; 2) the thermodynamic temperature model, reacting model, and surface catalysis conditions have great influence on surface heating rates; 3) the influence of gas models on aerodynamic characteristics is significant, while the influences of wall temperature conditions and surface catalysis on aerodynamic coefficients are weak.

     

/

返回文章
返回