DSMC量子动理学模型在火星再入流动中的应用

为解决化学反应模型高温数据缺乏的难题，探索DSMC方法量子动理学（QK）模型在实际中的应用，本文将该模型进一步应用于火星探测器稀薄气动特性的数值预测。通过计算探路者号在85 km、95 km和110 km高度的稀薄绕流，评估了QK模型的性能和稀薄气体效应的影响规律。结果表明，QK模型不依赖宏观的化学反应速率系数，适用于火星再入流动计算。化学反应及其模型对气动力的影响很小，但对气动热特性的影响不容忽略，考虑化学反应后的驻点热流可以下降约12%~14%。

Application of DSMC quantum kinetic model in re-entry flow of Mars

To solve the problem of lacking high temperature data in chemical reaction models and explore the application capacity of the Quantum Kinetic (QK) model, this paper further applies this model to the reentry flow of the Mars exploration vehicle for numerical prediction of rarefied aerodynamic characteristics. Via calculation of the flow field of the Pathfinder at the heights of 85 km, 95 km, 110 km, respectively, the performance of the QK model and the influence of the rarefied gas effect are evaluated. Results show that the QK model which relies not on the macroscopic reaction rates is suitable for the Mars reentry flows. The rarefied aerodynamics is not sensitive to the chemical reaction and its model; however, the influence of the chemical reaction on the aerothermodynamics cannot be neglected. The heat flux on the stagnation point can reduce by about 12%-14% after the chemical reaction is considered.