Passive Control Techniques to Alleviate Supersonic Cavity Flow Oscillation
Passive Control Techniques to Alleviate Supersonic Cavity Flow Oscillation
复制标题
DOI：
10.2514/1.30292
复制
发表时间：
2008-07
影响因子：
1.9
通讯作者：
Young-ki Lee;Min-Sung Kang;H. Kim;T. Setoguchi
中科院分区：
文献类型：
--
作者：
Young-ki Lee;Min-Sung Kang;H. Kim;T. Setoguchi
数值研究了两种被动控制技术对超音速空腔流动中压力振荡的抑制效果。本研究中提出的控制装置包括一个三角形凸起和一个安装在矩形空腔前缘附近的子空腔。采用基于有限体积格式的三维质量平均N-S计算和大涡模拟，研究了具有湍流特征的超音速空腔时变流动特性。结果表明，尾缘附近的压力振荡对整个随时间变化的空腔压力变化起主导作用。与凸起或吹气相比，子腔的存在可以更显著地衰减这种振荡，并且更大的子腔导致更好的控制性能。
The effectiveness of two passive control techniques for alleviating the pressure oscillation generated in a supersonic cavity flow was investigated numerically. The control devices suggested in the present study include a triangular bump and a subcavity installed near the leading edge of a rectangular cavity. Time-dependent supersonic cavity flow characteristics with turbulent features were examined by using the three-dimensional, mass-averaged Navier-Stokes computation based on a finite volume scheme and large eddy simulation. The results show that the pressure oscillation near the trailing edge dominates overall time-dependent cavity pressure variations. Such an oscillation can be attenuated more significantly in the presence of the subcavity compared with the bump or blowing, and a larger subcavity leads to better control performance.