侧向支柱对冲压增程弹用进气道性能影响研究

结合分区对接网格技术和二阶精度区域分解算法,对某冲压增程弹丸进气道在不同来流攻角和不同侧向支柱形状工况下的内外复杂流场进行了数值模拟.得到了临界工况下超声速进气道内外粘性流场复杂的波系结构,分析了流场结构特性和激波波系结构.当进气道扩压段有侧向支柱存在时,进气道总压恢复系数和动能系数均有所降低,而流场畸变指数则显著增大.在三种形状侧向支柱中,采用两端削尖支柱形状的进气道的性能最优.攻角的存在也在一定程度上降低了进气道性能.

Influence of Strut Shapes on Performance of Ramjet Assisted Range Projectile Inlet

With zonal patched grid technology and second-order zonal solver method, the numerical simulation on inlet complex flow field of solid rocket ramjet assisted range projectiles with different struts shapes was made at different Mach numbers. Complex wave structures of supersonic inlet at critical status are achieved by numerical simulation, and analysis on flow structure characteristic and shock wave structure is made. When there are struts at the divergent parts of inlet, the total pressure recovery coefficients and the kinetic energy coefficients of inlet decrease, and the flow distortion in- dex increases obviously. During the three types of struts, the performance of inlet with rhombic struts is excellent. The existence of angle of attack reduces the inlet performance.