Turbulent drag reduction by means of alternating suction and blowing jets

被引：13

作者：

Segawa, Takehiko

Mizunuma, Hiroshi

Murakami, Koki

Li, Feng-Chen

Yoshida, Hiro

机构：

[1] Natl Inst Adv Ind Sci & Technol, AIST, ETRI, Tsukuba, Ibaraki 3058564, Japan

[2] Tokyo Metropolitan Univ, Grad Sch Engn, Hachioji, Tokyo 1920397, Japan

来源：

FLUID DYNAMICS RESEARCH | 2007年 / 39卷 / 07期

基金：

日本学术振兴会;

关键词：

turbulent control; drag reduction; suction and blowing; spanwise perturbation; wall shear stress; PIV;

D O I：

10.1016/j.fluiddyn.2007.01.002

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The performance of an alternating suction/blowing jet (ASBJ) actuator array is tested in a water channel for Reynolds numbers ranging from Re-x = 3.8 x 10(5) to 5.7 x 10(5). The control method is used to show that local wall shear stress variations give a drag reducing effect of up to 10% at X-1 = 50 mm (X-1+ similar or equal to 1000) downstream from the ASBJ actuator array for the non-dimensional timescale of suction/blowing frequency T-p(+) =430 and Re =5.7 x 10(5). The Reynolds stress measured by a PIV system is also reduced at the same location. (C) 2007 The Japan Society of Fluid Mechanics and Elsevier B.V. All rights reserved.

引用

页码：552 / 568

页数：17

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