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串列双方柱绕流的数值模拟

DOI: 10.3969/j.issn.1674-0696.2013.05.24, PP. 1010-1013

Keywords: RNGk-ε模型,方柱绕流,阻力,升力,数值模拟,RNGk-εmodel,flowaroundsquarecylinders,drag,lift,numericalsimulation

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Abstract:

:?采用有限体积法,利用RNGk-ε模型对雷诺数Re=22000情况下二维串列双方柱绕流进行湍流数值模拟。着重研究了不同的方柱间距比时上下游方柱所受到的阻力、升力与涡街特性,以及各方柱后尾流的变化情况。计算结果表明:上游方柱受力明显大于下游方柱,但两方柱脉动频率几乎相等,而升力有较大差别;下游方柱所受阻力沿水流方向随着间距的增加而增大;受上游方柱尾流作用,下游方柱升力增加,脉动较单柱情形时明显变大;分析了不同间距下流场的演变情况。

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