合成射流对串列双圆柱受力特性及流场特性影响的数值模拟  

Numerical study on the influence of synthetic jets on the force characters and flow fields of two tandem circular cylinders

作　　者：王海博 张品源 于海龙 孙运兰 WANG Haibo;ZHANG Pinyuan;YU Hailong;SUN Yunlan(School of Petroleum and Natural Gas Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学石油与天然气工程学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2024年第1期76-85,共10页Journal of Changzhou University：Natural Science Edition

基　　金：常州大学科研启动基金资助项目(ZMF21020384)。

摘　　要：合成射流能够通过改变单个圆柱尾部的旋涡脱落模态有效抑制其涡致振动,但对多圆柱结构的控制效果尚待研究。采用数值模拟研究了对称布置在上游圆柱尾部的水平合成射流对串列双圆柱的受力特性和尾流特性的影响。在研究中,来流的雷诺数恒定为150,合成射流的位置角度为45°,2个圆柱中心之间的间距比为2~10。研究结果表明,水平合成射流能够同时降低上、下游圆柱的升、阻力系数,但过大的合成射流动量系数反而会导致上、下游圆柱的阻力系数均大于无合成射流控制情况下的值。当动量系数为2和4时,上游圆柱的尾迹完全由水平合成射流主导,变得完全对称;但下游圆柱的尾部始终存在交替脱落的旋涡。Though synthetic jets can effectively suppress the vortex induced vibration(VIV)of single circular cylinder by changing the vortex shedding pattern in the wake,its control effect on multi-cylinder structures still needs to be studied.In this work,the influence of synthetic jets issued horizontally and symmetrically arranged in the leeward side of the upstream circular cylinder on the force characters and wake structures of two tandem circular cylinders was investigated by numerical simulation.In numerical simulation,the Reynold number of the incoming flow is constant at 150,the position angle of synthetic jets is 45°,the dimensionless distances between centers of two circular cylinders are in the range of 2—10.The results show that synthetic jets issued in horizontal direction can reduce the lift and drag coefficients of both upstream and downstream circular cylinders,but the drag coefficients of both upstream and downstream circular cylinders can be larger than those of the uncontrolled case when the momentum coefficient of synthetic jets is too large.When the momentum coefficient of synthetic jets equals 2 and 4,synthetic jets issued in horizontal direction could completely dominate the wake of the upstream circular cylinder and make it perfectly symmetrical,but there are still alternative vortices shedding in the wake of the downstream circular cylinder.

关 键 词：双圆柱 合成射流 受力特性 尾涡结构 串列 

分 类 号：V21[航空宇航科学与技术—航空宇航推进理论与工程] O358[理学—流体力学]