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利用水气两相流的 VOF模型对典型的阶梯溢流坝面流动进行了紊流数值模拟 ,分别计算了 4个不同起始位置过渡阶梯的动水压力场、紊动耗散率等值线分布以及相应的阶梯坝面消能率。计算结果分析表明 :对于与此计算条件相似的阶梯溢流坝 ,其过渡阶梯的最佳起始点应设置在约 1/2曲线高度的坝顶曲线段上。
By using the VOF model of the two-phase flow of water and gas, the turbulent numerical simulation of a typical stepped overflow is carried out. The hydrodynamic pressure field, turbulence dissipation rate contour of the transition ladder at four different starting positions are calculated respectively Distribution and corresponding dam surface energy dissipation rate. The calculation results show that the optimal starting point of the transition ladder should be set on the crest curve segment of about 1/2 curve height for the step overflow dam with this calculation condition.