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首页> 外文期刊>Journal of the Aeronautical Society of India >NUMERICAL COMPUTATION OF FLOW PAST A RECTANGULAR CYLINDER PLACED AT DIFFERENT GROUND CLEARANCES FROM A FIXED WALL
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NUMERICAL COMPUTATION OF FLOW PAST A RECTANGULAR CYLINDER PLACED AT DIFFERENT GROUND CLEARANCES FROM A FIXED WALL

机译：固定墙不同地面间隙下矩形圆柱流场的数值计算

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摘要

An explicit Navier Stokes finite volume solver has been developed for calculation of flow past rectangular cylinders at varying clearances from a fixed ground wall. The governing equations are solved in primitive variables on a non-uniform staggered grid. The code was tested for unconfined flow past a square cylinder at various Reynolds numbers. Confined flow past a square cylinder with two different blockage ratios of 1/4 and 1/6 was computed at Reynolds number 1000. Subsequently flow past rectangular cylinders of two different aspect ratios, namely, 1.0 and 2.0 have been investigated at different non dimensional ground clearances ranging from 1.0 to 5.5 at three different Reynolds numbers, namely, 250, 500 and 1000. It is found that drag increases and lift becomes negative as the ground clearance decreases. The Strouhal number increases with decrease in ground clearance. Vortex shedding was observed for different combinations of aspect ratios, ground clearances and Reynolds numbers that were studied.
机译：开发了一个显式的Navier Stokes有限体积求解器，用于计算从固定地面到不同间隙处经过矩形圆柱体的流量。控制方程在非均匀交错网格上的原始变量中求解。测试了该代码在各种雷诺数下通过方筒的无限制流量。在雷诺数为1000的情况下，计算了通过两个具有1/4和1/6的两种不同阻塞率的方形圆柱的受限流。随后，在不同的无量纲地面上研究了通过两个不同的长宽比（即1.0和2.0）的矩形圆柱的流。在三个不同的雷诺数（即250、500和1000）下，间隙的范围从1.0到5.5。发现随着离地间隙的减小，阻力增加，升力变为负值。 Strouhal数随离地间隙的减小而增加。对于所研究的纵横比，离地间隙和雷诺数的不同组合，观察到涡旋脱落。

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