取水泵水流流态整体物理模型试验与局部防涡装置优化研究OA

In order to ensure stable and efficient supply of cooling water to the surrounding industrial infrastructures through a large-scale cold seawater intake pump station in Gizan,Saudi Arabia,a physical model experiments were conducted for the complex water flow state inside the pump station.The analysis results showed that the model experiment based on Froude Similarity Criterion,with a geometric scale of 1:15 being taken.It was verified that Reynolds number was greater than 30 000 and Weber number was greater than 120 at the inlet.The data could meet ANSI/HI9.8 standard that didn't take into account the impact of viscosity effect and surface tension on the experiments.The deviation of pump room P1 and P6 resulted in a relatively high swirl angle of the corresponding water pumps.Unstable ARL3 surface vortices and ARL2 underwater vortices around the inlet approached the accepted ultimate state.An anti-vortex device was proposed,including a triangular chamfer filling step,a low-level side wall plus rear wall rounded step,a triangular cross-section horizontal bottom plate separator,a trapezoidal cross-section vertical rear wall separator,and a submerged horizontal baffle.The results showed that the level of surface vortices at the inlet of the water pump was lowered from originally short-term stable ARL3 to unstable ARL3,and the level of underwater vortices was lowered from originally unstable ARL2 to stable ARL1.