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该文针对高雷诺数风洞试验研究结果,分别对加拿大国家试验中心NRCC试验和昂船洲大桥试验建模计算。使用标准k-ε双方程湍流模型结合边界层网格建模,计算得到的三分力系数与试验数据吻合良好。分析了雷诺数、来流湍流强度、中央开槽宽度对桥梁断面三分力系数的影响。研究结果表明,雷诺数效应和开槽宽度对阻力系数存在影响,但对升力系数与升力矩系数影响很小,来流湍流强度对三分力系数影响均不明显。
In this paper, based on the results of high Reynolds number wind tunnel test, the NRCC test and the Stonecutters Bridge test of Canada National Center were modeled. Using the standard k-ε turbulence model coupled with the boundary layer mesh modeling, the calculated third-component force coefficient is in good agreement with the experimental data. The effects of Reynolds number, turbulence intensity and width of central slot on the third-component force coefficient of bridge section are analyzed. The results show that the Reynolds number effect and the groove width have an impact on the drag coefficient, but have little effect on the lift coefficient and the lift moment coefficient, and the influence of the turbulence intensity on the third part force coefficient is insignificant.