RESEARCH ON INTERCEPTING CAPACITY OF DIFFERENT TYPES OF INTERCEPTING FACILITIES
The interception facility is a key structure in water pollution control.To investigate the fluid movement and the determination method of interception capacity in different interceptor facilities,pilot test,and computational fluid dynamics simulation were conducted.The results of fluid motion analysis showed that the narrowing effect of the overflow section made different water flow characteristics in the interceptor,which can be divided into wide top weir flow stage,gate hole free flow stage,gate hole flooded flow stage,and full tube with pressure flow stage.The water blocking and flow turning of the weir make the weir-type interceptor prone to siltation at the side away from the interceptor.The slot interceptor was influenced by the falling water of the slot,and the water flow fragmentation and a large amount of gas doping occurred,increasing the water loss;the slot and weir interceptor were mainly influenced by the slot,when the ratio of the weir to the slot was less than 1.2,and the influence of the weir dominated when the ratio was greater than 1.4.In this study,combined with hydrodynamics and mathematical analysis,the determination methods of interception capacity of different types of interceptors are derived.
intercepting weir facilityinterception capacityfluid movementcomputational fluid dynamicspilot test
万方数据
维普
