Volume 38, Number 3, June 2020
|Page(s)||649 - 656|
|Published online||06 August 2020|
Study on Flow Characteristic of Sub-/Super-Sonic Mixing Layer
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
In order to obtain the flow characteristics of sub-super-sonic mixing layer including velocity distribution, pressure distribution and development of mixing layer, experimental and numerical investigations were conducted. PIV technique was employed to measure the two-dimensional velocity distribution in the experiment while the standard k-ω turbulent considering the effect of compressibility was adopted to simulate the flow characteristic of mixing layer. The Mach number of subsonic stream and supersonic one was 0.11 and 1.32, respectively. The results show the flow of mixing layer is temporally transient. The interface between two streams lies initially as an approximately line segment; afterward, it becomes wrinkled and distorted; finally, it breaks up. The mixing layer develops linearly along streamwise direction in the time averaged velocity field with a growth rate of 0.135. The velocity and total pressure distributions in the mixing layer are self-similar.
Key words: mixing layer / flow characteristic / shear layer / growth rate / self-similar / supersonic
关键字 : 混合层 / 流动特征 / 剪切层 / 增长率 / 自相似 / 超声速
© 2019 Journal of Northwestern Polytechnical University. All rights reserved.
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