摘要
在Ｒｅ＝３．０×１０４～１．０×１０５的范围内，实验研究了声激励对钝圆柱体分离流动的影响，分离剪切层发展演化的改变，给出了最佳声激励频率范围，并探讨了声激励控制分离流动的作用机理。研究结果表明，最佳激振频率范围具有普适性。
The influence of an acoustic forcing on the separated shear layer of a blunt circular cylinder and the variation of evolution of the separated shear layer have been experimentally investigated in the Reynolds numbers ranging from 3.0×10 3 to 1.0×10 5.The optimum acoustic forcing frequency range is obtained.The interaction of the separated shear layer and the acoustic forcing and the mechanism of the acoustic forcing controlling the separation flow are discussed.The researches demonstrated there exists a universal optimum forcing frequency range,which is beneficial for engineering practive.
出处
《空气动力学学报》
CSCD
北大核心
1999年第2期130-140,共11页
Acta Aerodynamica Sinica
基金
国家自然科学基金
关键词
分离流动
分离剪切层
声激励
湍流控制
圆柱体
separation flow
separated shear layer
acoustic forcing
turbulence control
