摘要
为了准确获得喷管内不同燃气成分的参数,采用直接模拟蒙特卡罗(DSMC)方法结合可变软球(VSS)模型模拟喷管流动。单组分的计算结果与文献比较表明,所采用的程序和计算结果可信。对真空双组元钟形喷管内流动的模拟结果表明,压强扩散和热扩散的综合效应导致质量越大的分子越趋向于向边界层内扩散。
To accurately obtain the parameters of different species in a nozzle, the direct simulation Monte Carlo (DSMC) method in combination with the variable soft sphere (VSS) model was employed in the analysis of a low-density gas flow in a small nozzle. Comparison of the present results for simple gas with those of previous work in reference shows that the results are believable. Based on this, the mixed gas flow in the bell-shaped nozzle of a bipropellant engine was simulated. The results show the integrated effect of the pressure and thermal diffusion caused the heavy gases to move towards boundary layer.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2003年第2期112-114,165,共4页
Journal of Propulsion Technology
基金
高等学校博士学科点专项科研基金(No.20010248024)
博士后基金资助课题
