超音速燃燒衝壓引擎的工作流場中有些地方較為稀薄，因此，巨觀的連續體假設將不適用，需改用微觀的粒子觀點來分析，本文採用數值解(Numerical Solution)內的其中一種方法，直接模擬蒙地卡羅法(DSMC)，此法是目前較精確且廣泛用於模擬分析稀薄流的方法。 本文以DSMC法模擬超音速燃燒衝壓引擎內流場的變化，考慮燃料噴入與空氣混合情形的狀況，此時，如何達到良好的混合效率便成了主要關注研究的方向，因此，針對各種不同構型之燃燒室計算分析其混合效率。 Supersonic combustion ramjet engine work flow field are thin. Therefore, We have to use micro particle to analyze. The macro continuum hypothesis is no longer suitable. This article use one of the Numerical Solution to simulate DSMC. It is precise and used a lot of analyze recently. This article adopted the variety of Scramjet inner flow field by DSMC. We consider the situation of fuel ignition and air mixing. How to achieve good mixing efficiency has become concerned about the direction of the research, therefore, for a variety of different the combustion chamber configuration calculation and analysis its mixing efficiency.
