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Management of two-dimensional channel flow with a pair of streamwise vortices : Behavior of streamwise vortices and mean velocity field

Journal of Fluid Science and Technology Volume 2 Issue 3 Page 592-600
published_at 2007
2007020194.pdf
[fulltext] 651 KB
Title
Management of two-dimensional channel flow with a pair of streamwise vortices : Behavior of streamwise vortices and mean velocity field
Creators Mochizuki Shinsuke
Creators Kameda Takatsugu
Creators Yoneda Hirotaka
Creators Osaka Hideo
Creator Keywords
turbulent flow flow control secondary current channel flow vortex generator
An experimental study was conducted to examine the management of a two-dimensional turbulent channel flow with a pair of streamwise vortices. A common-flow down type streamwise vortex pair, generated by a pair of half-delta wings mounted on the wall, was introduced into a fully developed turbulent channel flow. The half-delta wings were as high as the inner layer thickness of the channel flow. The mean velocity and Reynolds shear stress distributions were measured and various properties were obtained in order to find meanings of the vortex generator for management of the turbulent channel flow. The convective motion of the secondary current is responsible for most of the streamwise momentum transfer toward the wall in the interaction between the vortices and the shear layer. In the velocity profile averaged over the spanwise extent, the velocity is accelerated below the vortex center and decelerated above the vortex center. Deformation of the mean velocity profile remained at the remarkable downstream distance of 250 times the wing height, which corresponds to 50 times channel the half-width H.
Languages eng
Resource Type journal article
Publishers The Japan Society of Mechanical Engineers
Date Issued 2007
File Version Version of Record
Access Rights open access
Relations
[ISSN]1880-5558
https://doi.org/10.1299/jfst.2.592
[isVersionOf] [URI]http://www.jstage.jst.go.jp/browse/jfst
Schools 大学院理工学研究科(工学)