Effect of angle of attack on aerodynamic characteristics of levitated freestream-aligned circular cylinder
Effect of angle of attack on aerodynamic characteristics of levitated freestream-aligned circular cylinder
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DOI：
10.1103/physrevfluids.8.024701
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发表时间：
2023-02
影响因子：
2.7
通讯作者：
Sho Yokota;Keisuke Asai;T. Nonomura
中科院分区：
文献类型：
--
作者：
Sho Yokota;Keisuke Asai;T. Nonomura
研究和讨论了攻角对自由对准圆柱体气动特性的影响。利用磁悬浮与平衡系统(MSBS)对模型进行了无支承干扰试验。风洞试验采用细度比为1.0的圆柱体模型。基于模型直径的雷诺数为AND。攻角的范围从0到。利用MSBS和粒子图像测速仪获得了气动力和速度场。时均气动力系数、力矩系数和时均速度场的计算结果表明，流动再附着发生的角度较大。气流再附着改变了气动特性，特别是升力矩系数、俯仰力矩系数和升力脉动。
An effect of an angle of attack on the aerodynamic characteristics of a freestream-aligned circular cylinder is investigated and discussed. The experiment without support interference was conducted using a magnetic suspension and balance system (MSBS) which can levitate and support a model. A cylindrical model with a fineness ratio of 1.0 was employed in wind tunnel tests. The Reynolds numbers based on the diameter of the model wereand. The range of the angle of attack is from 0 to. Aerodynamic forces and velocity fields were obtained by the MSBS and particle image velocimetry. The results of the time-averaged aerodynamic force and moment coefficients and the time-averaged velocity field illustrate that the flow reattachment occurs at an angle ofor more. The flow reattachment changes the aerodynamic characteristics, especially the lift and pitching moment coefficients and the lift force fluctuations.