Numerical Studies on the Sound Radiation by the Shocklets in the Two-dimensional Mixing Layer
The flow and sound generation of 2D mixing layers at Mc=0.75 are investigated with four different disturbance patterns.Various vortices evolution,including the single vortex,two vortices pairing and three vortices merging,occur because of different dominant Kelvin-Helmholtz instability mode.In each case,shocklets would appear and radiate sound effectively since the induction of the vortices.The hydrodynamics and acoustics characteristics of the mixing layers are investigated.For the hydrodynamics,the evolutions of disturbance energy and various thickness of mixing layer are calculated; for the acoustics,we analyzed the movement of shocklets and their influences to the sound radiation.The sources of different modes,the directivities of the sound radiation and the attenuation law are studied quantitatively.
Sound Shocklets Vortex
Qilong Guo Qin Li Hanxin Zhang
State key laboratory of aerodynamics, China Aerodynamics Research and Development Center,Mianyang, Sichuan 621000, China
国际会议
The 8th International Conference of Computational Fluid Dynamics, (ICCFD8)(第八届国际计算流体力学会议)
成都
英文
1-11
2014-07-25（万方平台首次上网日期，不代表论文的发表时间）