考虑运营参数影响下清隆桥泵站进水水流水力特性研究

Study of Hydraulic Characteristics of the Qinglongqiao Pump StationInflow under the Influence of Operational Parameters

为研究改扩建清隆桥泵站单面进水的水流水力特性,文章采用Gambit-CFD数值计算方法,开展了不同淹没水深、不同进水流量下的进水水流水力参数分析。研究表明,淹没水深不同,泵站内流速变化仍保持一致性,但流速变幅会越大,同时淹没水深越大,则流速值越高。淹没水深不会改变进水通道流线梯度,主要影响在于喉管侧的涡流。随淹没水深变化,泵站进水通道内涡量受影响最大,但在水深1.8m后影响效应会减弱。不同进水流量下,不会改变进水通道流线分布密集区位置,总体上涡量分布呈螺旋式递增特点;进水流量越大,进水通道内涡量越大,且在各流量方案间增长较为稳定。研究结果可对进水泵站的水流特性分析及泵站运营设计提供参考。

In order to investigate the hydraulic characteristics of the single-sided inflow at the Qinglongqiao Pump Station considering operational parameters,this study employed the Gambit-CFD numerical calculation method to analyze hydraulic parameters under different submergence depths and inflow rates.The research indicates that,despite varying submergence depths,the flow velocity within the pump station remains consistent,but the velocity fluctuation becomes more significant.Moreover,as the submergence depth increases,the flow velocity values also increase.Submergence depth does not alter the flow line gradient in the inflow channel but primarily affects vortices on the throat side.With changes in submergence depth,the vortex intensity within the pump station’s inflow channel is most affected,but the impact diminishes after a submergence depth of 1.8 meters.Under different inflow rates,the distribution of flow lines in the inflow channel remains concentrated in the same area,and overall vortex intensity shows a spiral-like increasing trend.Higher inflow rates result in larger vortex intensity within the inflow channel,and this increase is relatively stable among various flow rate scenarios.The findings of this study can provide valuable insights for the analysis of water flow characteristics at inflow pump stations and their operational design.