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首页> 外文期刊>Journal of the Aeronautical Society of India >SIMULATION OF DRAG CRISIS IN FLOW PAST A CIRCULAR CYLINDER USING 2D COMPUTATIONS
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SIMULATION OF DRAG CRISIS IN FLOW PAST A CIRCULAR CYLINDER USING 2D COMPUTATIONS

机译：使用二维计算模拟圆桶内流动的阻力

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摘要

The unsteady incompressible 2D Navier-Stokes equations are solved using a finite element method with Streamline-Upwind/Petrov-Galerkin (SUPG) and Pressure-Stabilizing/Petrov-Galerkin (PSPG) stabilization terms for high Reynolds number (10~5 to 10~6) flow past a cylinder to simulate drag-crisis. The mean drag coefficient for various Re are compared with experimental data. It is observed that the flow at Re = 10~6 separates much later, from the cylinder surface as compared to that at Re = 10~5 . The wake at Re =10~6 is narrower than that at Re = 10~5. The time-averaged flow field shows a standing bubble just downstream of the flow separation point for the Re = 10~5 flow. The bubble is not observed for the flow at Re =- 10~6. The energy spectrum of the flow exhibits the characteristics of 2D isotropic turbulence.
机译：使用流线上风/ Petrov-Galerkin（SUPG）和压力稳定/ Petrov-Galerkin（PSPG）稳定项的有限元方法，对高雷诺数（10〜5至10〜 6）流过圆柱体以模拟拖动危机。将各种Re的平均阻力系数与实验数据进行比较。可以看出，与Re = 10〜5时相比，Re = 10〜6时的流动从气缸表面分离的时间要晚得多。 Re = 10〜6时的尾波比Re = 10〜5时的尾波窄。时间平均流场在Re = 10〜5流的分离点下游显示了一个气泡。 Re = -10〜6时没有观察到气泡。流的能谱表现出二维各向同性湍流的特征。

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