应用TTM网格研究冲压增程弹丸进气道内外流场

基于TTM贴体网格生成法,研究了某冲压增程弹丸超音速进气道内外流场数值模拟中单区域网格生成问题,流场求解采用了二阶隐式TVD格式。NACA0012翼型跨音速流场算例结果表明,所采用的算法和编制的程序可靠,能够适用于具有亚、跨、超音速三种流态共存的复杂流场数值计算。对超音速进气道数值模拟结果显示,得到的流场复杂波系结构是合理的,来流马赫数和攻角变化显著影响着进气道性能。

Application of TTM grids on the research of inlet complex flow of ramjet assisted range projectile

Based on TTM body-fitted grids generation method, single zone grid generation of supersonic inlet of solid rocket ramjet extended-range projectile was investigated, and the second-order implicit TVD scheme was considered in the solver. As a validation, the numerical simulation of external transonic flow of NACA0012 foil was presented. The results show that the theory and the software used in this paper are credible, and can be used to predict the complex flow with the concurrence of subsonic, transonic and supersonic flows. The numerical results of supersonic inlet show that the complex wave structures achieved by numerical simulation are reasonable, and the far-field Mach number and the angle of attack affect the inlet performance obviously.