Physical Model Experiment on the Entrainment Effect of River-type Water Source Pump Station Intake
The entrainment effect of water intake from river-type water source pumping stations can have adverse impacts on the early-stage fish resources within the river.This study conducted physical model experiments on the entrainment effect at the water intake of the Jin Gang Tuo Pumping Station in the Yangtze River,using different water intake schemes.The results indicate that the height of the steel plates on both sides of the water intake box and the arrangement direction of the diversion pipes can influence the entrainment effect.The low-side plate scheme exhibits the most pronounced entrainment effect,with the resulting average lateral and vertical flow velocities being approxi-mately 1.4～1.8 times higher than those of the high-side plate scheme.Moreover,it has a more significant decelerating effect on the flow ve-locity in the longitudinal direction,leading to a 30%average decrease in the original longitudinal flow velocity of the river.The entrainment effect area of vertically arranged diversion pipes is approximately 1.5～2 m wider than that of lateral diversion pipes.The entrainment area of the vertical diversion pipes is evenly distributed on both sides of the water intake box,while the lateral arrangement causes a deviation of ap-proximately 2.5～4 m in the entrainment effect on both sides of the water intake box.The entrainment effect area is influenced by the river flow,with under low-flow conditions,the entrainment area for different schemes being between 13.5～18.5 m.Compared with the high flow condition,the entrainment area of each scheme is slightly increased,with an average increase of 1.1 times.Based on the entrainment effect area,the lateral diversion pipes scheme with high-side plates in this study is considered optimal.Its higher side plates and lateral diversion pipes arrangement contributed to reducing the entrainment effect.The elevated steel plates on both sides of the intake obstructed the water flow to some extent,alleviating the direct entrainment of water by the inlet pipes.This study provides a scientific basis for optimizing the de-sign of water intake projects.
entrainment effectwater intake projectflow fieldphysical model
万方数据
维普
