窄条控制件对流向振荡柱体尾流的控制  

Control of vortex shedding from a forced oscillating cylinder by a small element

作　　者：秦广素 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》2013年第4期370-375,424,共7页Journal of China Jiliang University

基　　金：国家自然科学基金资助项目(No.10872188)

摘　　要：施加一个静止的窄条控制件于流向振荡圆柱体尾流中,对尾流涡脱落及作用于柱体的平均阻力和脉动升阻力进行抑制.窄条厚度很小,长度方向与柱轴平行,窄条面垂直于来流,控制参数为窄条宽度和位置.尾流脉动速度谱和脉动升、阻力谱的分析表明,当控制件位于布控有效区域内时,可抑制振荡柱体尾流旋涡脱落,并且具有减阻和减少脉动升阻力的效果,布控有效区随柱体振频、雷诺数和窄条宽度而变.A narrow strip element was applied in the wake of a circular cylinder oscillating inline with the on- coming stream to suppress vortex shedding and reduce mean drag and fluctuating forces on the cylinder.The strips surface was perpendicular to the on-coming stream.The control parameters were scale and position of the element.Results of spectra analysis of fluctuating velocities in the wake and fluctuating lift on the cylinder showed that the vortex shedding could be suppressed if the element was set in certain regions referred to as effective zones.The effective zone changed with the Reynolds number,the oscillation frequency and the scale of the element.Measurements showed that the application of the element can reduce the mean drag and fluctuating forces of vortex shedding.

关 键 词：振荡柱体 流动控制 升阻力 

分 类 号：O351.3[理学—流体力学]