本文利用图像法对水泵吸水池内非均匀流的空气吸入量进行了试验研究,试验结果表明:子通道流量比率对吸水池内的空气吸入量影响较大,而截面平均流速对空气吸入量的影响要相对较小。当子通道流量比率较大时,会在吸水池下游的低流速区形成涡旋,严重时会形成空气吸入涡,而空气吸入量也会随着子通道流量比率的增大而急剧增加。
The experimental investigation was carried out to measure the entrained-air volume on the non-uniform flow in an open type pump sump by image method.The results show that entrained-air volumle are more sensitive to the flow ratio than the mean velocity.If the flow ratio is relatively larger,vortices,even air-entraining vortices,may be generated downstream at the low-velocity zone. The air-entraining volume increases sharply when the flow ratio rises.