Numerical Study on Receptivity of Flat-Plate Boundary Layer to External Disturbances

Numerical Study on Receptivity of Flat-Plate Boundary Layer to External Disturbances
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平板边界层对外扰动感受性的数值研究

DOI：
10.11345/nctam.62.3
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发表时间：
2014
期刊：
Theoretical and applied mechanics Japan
影响因子：
--
通讯作者：
Y. Fukunishi
Y. Fukunishi
中科院分区：
--
文献类型：
--
作者：
S. Noro;M. Shigeta;S. Izawa;Y. Fukunishi

文献摘要

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采用数值方法研究了平板边界层对涡度扰动的接受性。扰动作为壁面边界条件被间接引入。结果表明，只有低波数波动的自由流才能在壁面上产生涡度型。研究还表明，流向涡与边界层之间的相互作用促进了速度波动的快速增长。
Numerical studies were carried out to investigate the flat-plate boundary layer receptivity to vorticity disturbances. The disturbances were introduced indirectly as a wall boundary condition. As a result, it is shown that only the low wavenumber fluctuations in the freestream could generate the vorticity pattern on the wall. It is also shown that the interaction between the streamwise vortices and the boundary layer promotes the rapid growth of the velocity fluctuations.