涡流发生器涡激振动抑制研究  

Vortex-induced vibration suppression for vortex generators

作　　者：郝志永[1] 余恒旭[1] 宓为建[1] 卢凯良[1] 

机构地区：[1]上海海事大学物流工程学院,上海201306

出　　处：《中国工程机械学报》2012年第3期253-259,共7页Chinese Journal of Construction Machinery

基　　金：上海市科学技术委员会浦江计划资助项目(10PJ1404700);上海市教委重点创新资助项目(12ZZ149);上海市教育委员会重点学科建设资助项目(J50604);上海海事大学校基金资助项目(20100089;20110041;20110037)

摘　　要：通过风洞实验对涡流发生器的涡激振动抑制效果进行了分析研究,确定了涡流发生器的最佳几何参数,并探讨了涡流发生器涡激振动抑制机理.结果表明:从阻力系数的角度,涡流发生器比螺旋条纹圆管有更大的涡激振动抑制优势.热线风速仪的测量结果表明:光滑圆管及涡流发生器圆管尾流展向尾流速度相关系数不受雷诺数及涡流发生器的影响.涡流发生器主要是通过影响边界层的分离进而影响涡街脱落点来抑制涡激振动,对涡街脱落的沿展向三维扩展没有影响.By analyzing the vortex-induced vibration（VIV） suppression effect of wind tunnel experiments on Vortex Generators（VGs）,the optimal geometric parameters of VGs are first determined.Then,the VIV suppression mechanism is investigated.Finally,the results show that the VGs,rather than the helical strakes,possess stronger VIV suppression in terms of drag coefficient.Further elaborated from hotwire anemometry measurements,the correlation coefficient between wake flow spanwise and velocity is not affected by the Reynolds number and VGs.To this end,the VIV suppression is mainly achieved through the boundary layer separation and vortex shedding point alteration,whereas three-dimensional spanning of vortex shedding is not impacted by VGs.

关 键 词：涡流发生器 涡激振动 涡街脱落 

分 类 号：O353[理学—流体力学]