【摘要】 水泵吸水池中可能会产生空气吸入涡,这些涡能够将空气带入水泵,影响水泵的运行稳定性,造成水泵的性能下降。本文运用图像法对模型水泵开敞吸水池内不同工况下的空气吸入量进行了试验研究。试验结果表明,在水位高度和平均流速都相同的条件下,采用30°和60°防涡墙时的空气吸入量要明显小于采用0°防涡墙时的情况。这说明30°和 60°防涡墙能够有效降低吸入涡所引起的空气吸入量,所以可在实际工程中适度加大防涡墙的角度来减少空气的吸入。更多还原

【Abstract】 Air induced by entrained-vortex occurring in the pump sump can be absorbed into the pump, which can influence the operation stability of pump and reduce the pump performance. Experimental investigation was carried out to measure the entrained-air volume in an open pump sump under different operation conditions by image method. The results show that when the angle of anti-vortex wall equals 30° or 60° the entrained-air volume is obviously less than that when the angle of anti-vortex wall equals 0°, if the water depth and the average velocity are same. The entrained-air volume can decrease effectively in the actual engineering when the angle of anti-vortex is selected appropriately.更多还原