A Study on the Inlet Characteristics of a 90° Lateral-Inlet Pumping Station with a Truncated River

The flow pattern in a pumping station intake basin has a significant influence on the inlet conditions of the pumping machine. For the purpose of solving the problems of flow disorder and the uneven flow velocity distribution in the intake basin of a lateral-inlet pumping station with a truncated-type canal, this study takes a flood discharge pumping station as an example and then studies and analyzes the flow pattern in the inlet pool of a lateral-inlet pumping station with a truncated-type canal. The Revit2018 modeling software is used to establish a three-dimensional model, CFD fluid calculation software is used to simulate the fluid, and the reliability of the numerical simulation results is verified using physical model tests. This paper proposes a new type of separated guide wall rectification measure, which is combined with a guide pier and other optimization measures to improve the flow of the inlet pool and is composed of a variety of programs. The results show that the optimization scheme of a “closed flow guide wall and flow guide pier” is the most effective. Compared with the original scheme, the lateral flow velocity distribution ratio and the mean square error (MSE) are reduced, while the axial flow velocity uniformity is increased by 52.24% and the axial flow velocity weighted average angle is increased by 5.92°. The optimal spacing of the dividing deflector wall is investigated using the response surface methodology, and further optimization of the scheme results in a further increase of 2.23% in the flow uniformity.