吸气式太阳能热推进系统进气道特性分析

摘要

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。%Air-breathing scramjet propulsion is the basis of air-breathing solar thermal propulsion technology.How to design an ideal air-inlet is crucial for the propulsion system.By taking advantage of the common method,the DSMC(direct simulation Monte Carlo)on rare-field gas dynamics research,was made to simulate two kinds of air-inlets,which obtained a lot of air parameters such as temperature,density,coefficient of flow and velocity.Then it selected a better air-inlet shape from comparison and treated the shape as a basic air-inlet shape in air-breathing solar thermal propulsion system.It lays a foundation for the design,computation,analysis and optimization on the whole system.