Global effect of local skin friction drag reduction in spatially developing turbulent boundary layer
Global effect of local skin friction drag reduction in spatially developing turbulent boundary layer
复制标题
空间发展的湍流边界层中局部表面摩擦阻力减少的全局效应
DOI:
10.1017/jfm.2016.545
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发表时间:
2016
影响因子:
3.7
通讯作者:
Frohnapfel
中科院分区:
文献类型:
--
作者:
Hasegawa;Schlatter;Frohnapfel
A numerical investigation of two locally applied drag-reducing control schemes is carried out in the configuration of a spatially developing turbulent boundary layer (TBL). One control is designed to damp near-wall turbulence and the other induces constant mass flux in the wall-normal direction. Both control schemes yield similar local drag reduction rates within the control region. However, the flow development downstream of the control significantly differs: persistent drag reduction is found for the uniform blowing case, whereas drag increase is found for the turbulence damping case. In order to account for this difference, the formulation of a global drag reduction rate is suggested. It represents the reduction of the streamwise force exerted by the fluid on a plate of finite length. Furthermore, it is shown that the far-downstream development of the TBL after the control region can be described by a single quantity, namely a streamwise shift of the uncontrolled boundary layer, i.e. a changed virtual origin. Based on this result, a simple model is developed that allows the local drag reduction rate to be related to the global one without the need to conduct expensive simulations or measurements far downstream of the control region.
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影响因子:
3.7
作者:
Y. Kametani;K. Fukagata
通讯作者:
Y. Kametani;K. Fukagata
DOI:
--
发表时间:
1951
期刊:
影响因子:
--
作者:
F. Goldschmied
通讯作者:
F. Goldschmied
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
R. Narasimha;K. Sreenivasan
通讯作者:
K. Sreenivasan
DOI:
10.1016/j.ijheatfluidflow.2010.02.004
发表时间:
2010-06
期刊:
Proceeding of Sixth International Symposium on Turbulence and Shear Flow Phenomena
影响因子:
--
作者:
B. Frohnapfel;Y. Hasegawa;N. Kasagi
通讯作者:
B. Frohnapfel;Y. Hasegawa;N. Kasagi
影响因子:
4.6
作者:
Stroh, A.;Frohnapfel, B.;Hasegawa, Y.
通讯作者:
Hasegawa, Y.