载人飞船等离子体鞘电子密度分布的数值计算

Numerical Study of Electron Density in the Plasma Sheath over the Capsule

研究高温空气的不同物理模型对载人飞船返回舱等离子体鞘电子密度的影响 ,包括热力平衡的化学非平衡模型与热力、化学都是非平衡的模型的比较 ,以及七组元模型与十一组元模型的比较。采用NND格式和时间预处理技术 ,得到了非平衡流全NS方程的时间渐近解 ,计算了载人飞船等离子体鞘电子密度的典型结果。与飞行试验及有关文献数值计算结果之比较表明 。

The effects of different high temperature air models on electron density in the plasma sheath of the reentry capsule are studied, including the comparison between chemical non-equilibrium model and thermochemical non-equilibrium model, as well as that between 7 species model and 11 species model. The NND scheme and time preconditioning technique is applied to solve the full Navier-Stokes equations of non-equilibrium flow. Typical results of electron denstiy in the plasma sheath are obtained. The numerical results are good compared with the flight measurement and other numerical results.