侧滑角对鼓包诱导曲面激波/边界层干扰特性的影响

利用仿真方法对侧滑条件下设计马赫数为2的三维壁面鼓包诱导流场进行了研究。结果表明:随着侧滑角的增大,迎风面的展向压力梯度增大,鼓包表面高压中心向迎风面偏移使得迎风面前缘旋涡强度增强,迎风侧出口总压恢复损失,最终导致鼓包下游流场畸变增加。同时鼓包表面流动拓扑结构表明,随着侧滑角的增加，迎风面分离区的准锥形相似特性增强,而背风面由准锥形相似逐渐发展为准柱形相似。 

Characteristics of bump induced curved shock/boundary layer interaction under the sideslip condition

The simulation method was used to investigate the flow field around the three-dimensional surface bump at designed Mach number 2 under the sideslip condition. Results show that as the sideslip angle increases, the pressure gradient on the windward side increases, and the high pressure center of the bump surface shifts toward the windward side. As a result, the strength of the vortex near the bump leading edge increases,which causes the loss of the total pressure recovery at windward side and finally makes the distortion of bump downstream flow field increase. At the same time, the surface flow topology of the bump shows that the conical similarity of the windward side separation zone increases as the sideslip angle increase, while the separation region on the bump leeward side evolves from a quasi-conical similarity to a quasi-cylindrical similarity gradually.