Boundary-layer receptivity under interaction of free-stream turbulence and localized wall roughness

被引：0

作者：

Luyu SHEN ^{[1
]}

Changgen LU ^{[2
]}

机构：

[1] School of Atmospheric Science, Nanjing University of Information Science and Technology

[2] School of Marine Science, Nanjing University of Information Science and Technology

来源：

Applied Mathematics and Mechanics(English Edition) | 2016年 / 37卷 / 03期

关键词：

boundary-layer receptivity; Tollmien-Schlichting(T-S) wave; free-stream turbulence(FST); localized wall roughness;

D O I：

暂无

中图分类号：

O357.5 [湍流（紊流）];

学科分类号：

080103 ; 080704 ;

摘要：

The boundary-layer receptivity under the interaction of free-stream turbulence(FST) and localized wall roughness is studied by the direct numerical simulation(DNS) and the fast Fourier transform. The results show that the Tollmien-Schlichting(T-S) wave packets superposed by a group of stability, neutral, and instability T-S waves are generated in the boundary layer. The propagation speeds of the T-S wave packets are calculated. The relation among the boundary-layer receptivity response, the amplitude of the FST, the roughness height, and the roughness width is determined. The results agree well with Dietz's experiments. The effect of the roughness geometries on the receptivity is also studied.

引用

页码：349 / 360

页数：12

共 6 条

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Changgen Lu ab Weidong Caob Yanmei Zhang b Jintao Pengb a College of Atmospheric Science Nanjing University of Information Science Technology Nanjing China b College of Environmental Science and Engineering Hohai University Nanjing China .

Progress in Natural Science, 2008, (07) :873-878

[2]

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[4]

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[5]

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[6]

Excitation of Tollmien-Schlichting waves by acoustic and vortex disturbance scattering in boundary layer on a wavy surface[J] . N. A. Zavol’skii,V. P. Reutov,G. V. Rybushkina. Journal of Applied Mechanics and Technical Physics . 1984 (3)

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