大扩散角泵站前池楔形导流墩整流研究

Research on the Improvement of the Flow Patterns for Forepool with Large Diffusion Angle by the Wedge-shaped Guide Pier

泵站前池扩散角过大易产生不良流态,影响进水池内的水流流态,进而恶化水泵进水条件,降低水泵运行效率,严重时甚至危及泵站安全运行。以某55°大扩散角正向前池为研究对象,采用数值模拟和模型试验相结合的研究方法,通过在前池内设置楔形导流墩以整治流态。研究结果表明:将楔形导流墩设置在前池进口处可以更好地起到分流作用,合理设置组合式对称楔形导流墩能有效提高整个前池的流态改善效果。研究成果对类似泵站的前池整流有一定的参考价值。

A pumping station forebay with excessive diffusion angle is more likely to result in bad flow patterns in the intake pool,which will affect the flow patterns in the inlet pool,worsen the water inlet condition of the pump,reduce the operation efficiency of the pump,and even affect the normal operation of the pumping station. Both numerical simulation and model test methods are adopted to do research on the flow patterns in the inlet pool for a pumping station with diffusion angle of 55° in the forebay by setting diversion pier in the front pool. The results shows that the wedge diversion pier could play a diversion role well in the inlet of the forebay,and reasonable arrangement of the combined symmetrical wedge diversion pier could effectively improve the flow patterns in the forebay.This kind of diversion pier is simple in structure and small in engineering quantity,so it is easy to popularize and apply it.The research results have a certain reference value to rectify the flow patterns in the forebay for similar pumping stations.