Study On Numerical Simulation Of Inlet Conduit Of Yellow River Diversion Low Lift Pump Station

Irrigation from the Yellow River is one of the important manifestations of agricultural development.The lower reaches of the Yellow River run across the North China Plain.After water and sediment regulation,the sediment control of reservoir causes scouring along the river below the Xiaolangdi.The river bed section tends to be narrow and deep,and the water level drops at the same flow rate.This caused the water diversion capacity of some arterial irrigation diversion areas in the lower Yellow River to be greatly reduced.In order to solve the problem of water diversion capacity,a pumping station was built in a yellow river diversion irrigation area.In this paper,the hydraulic design parameters of the inlet passage of the pump station are simulated,and the scheme of optimizing the hydraulic parameters is proposed.1 This paper introduces the types and characteristics of the closed inlet conduit of the pump station,as well as the research situation of the flow pattern and the hydraulic optimization design of the inlet conduit of the pump station.The control equation,turbulence model,boundary conditions,mesh generation and other aspects involved in the three-dimensional turbulence simulation of the intake channel are described.2 The different effects of hydraulic design parameters on the flow performance of the dustpan inlet conduit are analyzed.The design scheme of the hydraulic parameters of the dustpan inlet conduit of the low lift pumping station in the Yellow River Diversion Project is put forward.The objective function of the optimal hydraulic design of the inlet conduit and the head loss of the inlet conduit are used to judge the flow field.3 The effects of the hydraulic parameters of the dustpan shaped inlet conduit on the flow characteristics is simulated.The effects of different conduit length,inlet height,throat height,horn diameter,profile and bottom line angle on the velocity distribution of different typical sections of the inlet conduit were studied.The uniformity of velocity distribution in the outlet section of the inlet conduit,the average angle of flow into the pump and the head loss of the are calculated and compared.The corresponding model tests are carried out.