吸气式太阳能热推进系统进气道特性分析

吸气式冲压推进技术是吸气式太阳能热推进技术的基础。如何设计一种性能理想的进气道是吸气式太阳能热推进技术研究的重点。应用稀薄气体动力学仿真常用的直接数值模拟蒙特卡洛算法对两种常见的进气道结构进行仿真分析,得到两种进气道工况下气体的温度、密度、流量系数和速度等参数的分布,并进行对比。通过比较,选择一种性能较好的构型作为吸气式太阳能热推进系统的进气道,从而为后续系统的设计、计算、分析和优化打下了基础。

Property analysis about Air inlet of the air-breathing solar thermal propulsion

Air-breathing solar thermal propulsion is proposed for the first time which is based on air-breathing propulsion and solar thermal propulsion. The heated gas sprays out through the nozzle and produces thrust. The propulsion works in the region almost 130km above the ground. The region remains between continuous medium flow region and free-molecule regime. Continuity hypothesis is untenable. Two kinds of air inlets are simulated. Distribution of the temperature, density, and velocity has been calculated. So did the coefficient of flow. Better configuration of the inlet has been chosen for the gas gathering unit of the air-breathing solar thermal propulsion.