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Bluff-body Flow Control by Aerodynamic Tripping

机译:通过气动跳闸控制钝体流

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摘要

Drag reduction and lift enhancement for a circular cylinder is achieved here simultaneously by steady rotation and rotary oscillation of the cylinder. Rotary oscillation provides the necessary aerodynamic tripping of the laminar boundary layer initiated on the windward side of the cylinder and thus reducing the drag. While the steady rotation provides the high lift via Magnus- Robins effect. Results are presented here for a Reynold's number (based on cylinder diameter and oncoming flow velocity) of 1000. Proper orthogonal decomposition (POD) of the vorticity data obtained from the solution of Navier-Stokes equation helps in identifying the physical mechanism(s) involved in the flow.
机译:在此,通过气缸的稳定旋转和旋转振荡同时实现了用于气缸的减阻和升力的提高。旋转振动提供了在圆柱体的迎风侧引发的层流边界层的必要的空气动力学跳闸,从而减小了阻力。稳定的旋转通过Magnus-Robins效应提供高升力。此处显示的结果是雷诺数(基于圆柱体直径和即将来临的流速)为1000的结果。从Navier-Stokes方程的解中获得的涡度数据进行正确的正交分解(POD)可帮助您确定所涉及的物理机制在流中。

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