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论文期刊

论文标题    Effects of Velocity Ratio on turbulent Mixing Layer at high Reynolds number
作者    Fude Guo, Bin Chen, Liejin Guo, Ximin Zhang
发表/完成日期    2009-03-27
期刊名称    Journal of physics: conferences series
期卷    147(1)
相关文章   
论文简介    In this paper the effect of velocity ratio on plane mixing layer was experimentally investigated by Particle Image Velocimetry (PIV). The velocity ratio between low and high speed side are 0.25 and 0.50, respectively. The Reynolds number based on the velocity difference of two streams and hydraulic diameter of the channel is 66000. The results indicate that the maximum mean Reynolds stress on the same cross section is decreasing with the velocity ratio increasing. The maximum dimensionless mean vorticity is decreasing according to an exponential law along the stream-wise direction and the decreasing speed of dimensionless mean maximum vorticity is increasing with the velocity ratio increasing. The dimensionless vorticity caused by plate wake is decreasing sharply in a very short distance along the down stream wise direction and the decreasing speed is faster when the velocity ratio is larger.
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