高含沙水泵站前池扩散角试验与分析

Test and Analysis of Diffusion Angle of Front Pool of High Sand Water Pumping Station

泵站正向进水前池扩散角大小是影响正向进水前池水流流态及池长的主要因素,通过盐环定扬黄工程三泵站水工模型试验,观测正向进流前池不同水沙条件、不同工况下泵站进口流态、流速分布、前池的淤积形态。在前池进口扩散角20°、25°、30°、35°4种工况下,结果表现为:主流带流速值随着扩散角增加而增大;前池两侧淤积厚度大于中部,含沙量越大,前池淤积厚度越大;相同水沙条件、运行相同时间,扩散角越小淤积量越大;泵站前池前池扩散角25°和30°的布置较合理,水流、淤积等综合表现较好。

The main factors affecting the flow state and the length of the water pool in the forward water intake are the sizes of the diffusion angle of the forward water intake pool at the pumping station.The inlet flow state,flow rate distribution and siltation pattern of the front pool under different conditions and different conditions observed.At the inlet diffusion angles of 20°,25°,30°,and 35°of the former pool,the results show that the flow rate of the mainstream zone increase with the increase in the diffusion angle.The siltation thickness on both sides of the front pool is greater than that in the middle,and the greater the sediment content,the greater the siltation thickness of the front pool.The same water and sand conditions,running the same time,diffusion angle hours,large amount of silt.The distribution of the diffusion angle of 25°and 30°in the front pool of the pump station is more reasonable,and the combined performance of water flow and silting is better.