泵站进水口淹没深度对漩涡的影响

The influence of submerged depth of pump station inlet on vortex

泵站流道进水口漩涡会危害水泵运行,降低水泵性能。进水口漩涡的发生发展情况与进水口淹没深度有关,结合泵站实际运行情况选取5种不同的淹没深度,通过数值模拟,分析不同淹没深度下流道进水口的流场结构、漩涡的涡量变化及分布规律。研究结果表明:在流量不变,淹没深度0.09 D^0.2 D时,随着淹没深度的增大,漩涡强度变小。淹没深度为0.09 D的漩涡强度最大,在淹没深度为0和0.05 D的状况下没有明显漩涡产生。淹没深度为0.09 D、0.14 D、0.2 D时,漩涡均在距离进水流道进水口顶板以下0.3m附近终止。研究结果可为泵站设计进水口淹没深度参数提供一定参考。

The inlet vortex of the pumping station can endanger the operation of the pump and reduce the performance of the pumping station.The occurrence and development of the intake vortex is related to the submerged depth of the intake.In this paper,five different submerged depths were selected based on the actual operation of the pumping station,and therefore,the numerical simulation was carried out by using fluent software.The flow field structure of the intake of different submerged depths were analyzed,and then the vortex value and the distribution law of vortex were obtained.The results showed that submerged depth at 0.09D(intake height of passage)to 0.2D and constant flow rate,the vortex strength become smaller with the increase of submerged depth..The vortex intensity of the 0.09D submerged depth was the largest,and there was no obvious vortex at the submerged depth of 0D and 0.05D.The results also revealed that when the submerged depth was 0.09D,0.14D and 0.2D,respectively,the vortex was terminated near 0.3 mbelow the top plate.The research results can provide a reference for the design of the inlet submerged depth of the pumping station.