泵装置拍门阻力损失数值模拟与试验

采用数值模拟与模型试验相结合的方法对模型泵装置出口拍门的阻力损失进行研究.通过模型试验获得了出口拍门在不同开启角度时的阻力损失值,归纳了拍门阻力损失随流量变化的规律.结果表明:拍门阻力损失受导叶出口环量的影响,阻力损失与流量的平方不呈正比,在相同流量时,泵装置效率下降值与拍门开度亦非正相关.应用CFD软件对泵装置设计工况时拍门开启角度25°及无拍门时出水流态进行数值计算,分析了有、无拍门的出流流态,依据数值模拟结果预测了拍门阻力损失,在设计工况时的数值预测值与试验结果吻合较好.

Numerical Simulation and Experiment on Resistance Loss of Flap Gate

In order to investigate the resistance characteristics of flap gate, the experimental and numerical simulation studies of resistance loss of flap gate were performed. Outlet circulation of the pump has great influence on resistance loss of flap gate, so the resistance loss and the square value of flow do not show the proportional relationship. In the conditions of the same flow, efficiency decreased value of pump system was negative correlated with the open angle of flap gate. On the basis of numerical simulation, flow patterns of the outlet were analyzed with and without flap gate under designed operating condition. The resistance loss of flap gate was predicted. A good agreement was achieved between the predicted data and the experimental data under designed operating condition.