尾部喷射对横向振荡柱体尾流的抑制  

Suppression of vortex shedding from a transversely oscillating cylinder by base blowing

作　　者：吴二帅 邵传平[1] 

机构地区：[1]中国计量学院计量测试工程学院,浙江杭州310018

出　　处：《中国计量学院学报》2015年第1期26-33,共8页Journal of China Jiliang University

基　　金：国家自然科学基金资助项目(No.10872188)

摘　　要：沿圆柱的一条母线开一条宽度h/D=0.02的狭缝作为喷射口,并使其与来流平行.研究了雷诺数Re=4 400、无量纲振荡频率feD/V=0.019,Re=6 900、feD/V=0.048和Re=2 400、feD/V=0.25三种状态下尾部喷射对横向振荡柱体尾流的抑制.通过对风洞中的烟线显示和热线测量得到的数据进行分析表明,在一定的喷射速度范围内,尾部喷射能够对横向振荡柱体的尾流进行很好的抑制.Air was blowing out from a span-wise slit of width h/D=0.02. The suppression effect of vortex shedding at non-dimensional oscillation frequencies feD/V = 0. 019, 0. 048 and 0. 25 （the corresponding Reynolds numbers（Re） were 4 400, 6 900 and 2 400, respectively） to the transversely oscillating cylinder were studied. Results of the smoke-wire visualization and hot-wire measurement in a wind tunnel show that vortex shedding from the oscillating cylinder can be effectively suppressed at all the three conditions and the effective range of blow velocity changes with the change of feD/V and Re.

关 键 词：振荡柱体 流动控制 尾部喷射 

分 类 号：O357.5[理学—流体力学]