采用RANS方法和重叠网格计算了带自由液面的全航速范围内桥脚分置式门桥绕流问题.自由液面的模拟采用单相Level-Set方法,Reynolds应力采用k-ω模型,采用PISO算法求解RANS方程,获得门桥阻力、波型等参数.简要描述了重叠网格及单相Level Set自由液面模拟方法.通过对桥脚分置式门桥在全航速范围下数值求解与试验结果比较,结果表明本方法可有效模拟全航速下的门桥绕流问题.%RANS methods and overlap grid are used to calculate the potoon flow around with free surface. Computational grid is overlap grid pattern. The single phase Level-Set method was used for the free surface treatment, the SST k-ω turbulence model, cell finite difference method and PISO algorithm were employed in viscous flow calculation with solving RANS equations. The mathematicl model and solution of overlap grid and simulation method of single phase Level-Set method were described briefly, too. Through comparing the numerical solution with overlap grids and the experimental results for fix and free potoon mode, The results show that overlap grid and single phase Level-Set method can better simulate the viscous free-surface flow around the potoon.
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