【摘要】 本文对三峡原型混流式水轮机进行了三维非定常湍流计算 ,得到了水轮机的非定常流场 ,预测了尾水管内、转轮前、活动导叶前、固定导叶前和蜗壳进口的压力脉动。通过与模型试验结果进行比较可以看出 ,本文提供的计算结果能够准确预测水轮机内的压力脉动。分析结果表明 ,尾水管内涡带及转轮与活动导叶间的动静干扰是产生压力脉动的两个主要脉动源 ,并在整个水轮机流道内传播。更多还原

【Abstract】 In this paper,the three-dimensional unsteady turbulent flow is simulated through the whole flow passage of Three Gorge Francis hydraulic turbine.The pressure pulsation are predicted at positions in the draft tube,in front of runner,wicket gate,stay vane,and at the inlet of spiral case.The comparison between the calculated and the experimental results shows that the simulation calculation could simulate the pressure fluctuation in the hydraulic turbine very well.Based on the result analysis,it is demonstrated that the two main factors,which create the pressure pulsation in the turbine,are the unsteady vortex rope in the draft tube and the retor-stator interaction between wicket gates and runner.The results also indicate that the pressure pulsation spread widely inside the whole passage from the draft tube to the spiral case.更多还原