导流角和凹面腔深度对2级PDE中激波聚焦的影响

Effect of Diversion Angle and Concave Cavity Depth on Shock Wave Focusing in 2-Stage PDE

为了研究凹面腔内激波聚焦的机理以及导流角和凹面腔深度对激波聚焦的影响,在不同导流角和凹面腔深度条件下开展了3维凹面腔内激波聚焦的数值模拟,对各测量点的压力和温度进行分析。结果表明:合适的导流角有利于激波聚焦,导流角为25°时凹面腔底部的峰值压力和温度最高,激波聚焦效果最好;合适的凹面腔深度有利于激波聚焦,凹面腔深度为25 mm时凹面腔底部的峰值压力和温度最高,激波聚焦效果最好。

In order to research the mechanism of shock wave focusing in concave cavity and the influence of diversion angle and concave cavity depth on shock wave focusing,the numerical simulation of shock wave focusing in 3D concave cavity was carried out under the condition of different diversion angle and concave cavity depth.The pressure and temperature of each measuring point were analyzed.The results show that the proper angle of diversion is favorable for shock wave focusing,and the peak pressure and temperature at the bottom of concave cavity are the highest when the diversion angle is 25°,and the effect of shock wave focusing is the best曰The proper depth of the concave cavity is favorable for shock wave focusing,and the peak pressure and the temperature at the bottom of the concave cavity are the highest when the concave cavity depth is 25 mm,and the effect of shock wave focusing is the best