论文部分内容阅读
数值格式为有限体积的隐式ＴＶＤ格式，具有高分辨率、快速稳定收敛、适用于复杂型面流场的特点。该文对典型的锥形喷管和抛物线扩张段喷管内的三维流场进行了数值模拟，得出喷管内物理参数的分布和倾斜入流对喷管侧向力及其力矩影响的变化曲线，计算结果和实验数据吻合良好。该方法可以推广到任意曲面型面喷管内流场的数值计算，为进一步进行曲面型微推偏喷管的设计奠定基础。
The numerical format is a finite volume implicit TVD format with high resolution, fast and stable convergence, and is suitable for the flow characteristics of complex profiles. In this paper, the numerical simulation of the three-dimensional flow field in a typical conical nozzle and a parabolic expansion nozzle is carried out. The distribution of the physical parameters in the nozzle and the curve of the influence of the oblique inflow on the nozzle lateral force and moment are obtained. The result is in good agreement with the experimental data. The method can be generalized to the numerical calculation of the flow field inside a nozzle of any surface profile, which lays the foundation for the further design of the curved push-off nozzle.