论文部分内容阅读
本文分析了ENO格式的特点 ,并应用于Euler方程和全NS方程的迁移项和压力项 ,模拟了各种喷管流动。首先计算了JPL喷管流动 ,取得了和实验一致的结果 ,分析了喷管内产生弱激波的原因 ;其次计算了非定常二维喷管流动 ,给出了相应的计算结果 ,并分析了壁面附近流场的拓扑结构 ;最后计算了摆动喷管的流动及推力矢量计算 ,取得了推力随摆角变化的规律 ,和实验结果比较表明基本一致
In this paper, the characteristics of ENO format are analyzed and applied to the migration term and pressure term of Euler equation and all-NS equation to simulate the nozzle flow. First, the flow of JPL nozzle is calculated and the experimental results are consistent with the experimental results. The reason of the weak shock generated in the nozzle is analyzed. Secondly, the unsteady two-dimensional nozzle flow is calculated and the corresponding calculation results are given. In the end, the calculation of the flow and the thrust vector of the oscillating nozzle is made, and the law of the variation of the thrust with the swing angle is obtained, which is basically consistent with the experimental results