Abstract
A model of the pumping station lateral inflow forebay was established to explore the influence of different lateral bending angles of the pumping station lateral inflow. The lateral bending angles were set at 45° and 60°, and the two schemes were calculated separately. Analyzing the results of the numerical simulation showed that the flow patterns of the diversion passages of different schemes were good, but the advancing mainstream of the 1# inlet passage near the sidewall was seriously deviated after entering the forebay. Most of the water can flow smoothly into the inlet passage, while a small part of the water flowed into the sidewall and formed a backflow, resulting in a large-scale backflow zone near the left sidewall of the forebay. Moreover, the flow in the backflow zone was turbulent, which affected the water inlet conditions of the 1# water flow passage. Comparing the water inlet conditions of the water passage with the numerical simulation results of 45° and 60° bending angles showed that the larger the lateral bending angle of the forebay was, the worse the flow pattern of the water flow, and the more unfavorable the pump operation.
Highlights
Irrigation and drainage pumping stations have played a vital role in fighting drought and waterlogging, ensuring increased agricultural production and income and developing the rural economy. e arrangement of several pumping stations is often restricted by objective factors such as water flow conditions and actual topography, such that the arrangement of lateral water intake has to be adopted
Hou [7] used Computational Fluid Dynamic (CFD) methods to study the flow pattern of the pressure forebay of a pumping station, and the good agreement between the calculation results and the empirical formula showed the accuracy and reliability of the CFD calculation method. e numerical simulation results provided a basis for the hydraulic optimization design of the pressure forebay
Numerical Simulation Results of the Lateral 60° Bending Angle Scheme. e position of the characteristic section selected in the plan for a 60° lateral bending angle is the same as that for a 45° bending angle
Summary
Irrigation and drainage pumping stations have played a vital role in fighting drought and waterlogging, ensuring increased agricultural production and income and developing the rural economy. e arrangement of several pumping stations is often restricted by objective factors such as water flow conditions and actual topography, such that the arrangement of lateral water intake has to be adopted. Erefore, taking effective rectification measures to improve the inlet flow pattern of the pumping station [1,2,3,4] is of great importance to the design and transformation of the pumping station as well as the economy and safety of the project operation. Experts and scholars have carried out a large amount of rectification optimization research on the intake buildings of the pumping station and achieved fruitful results. Hou [7] used Computational Fluid Dynamic (CFD) methods to study the flow pattern of the pressure forebay of a pumping station, and the good agreement between the calculation results and the empirical formula showed the accuracy and reliability of the CFD calculation method. Liu et al [8] used gates to control the water levels of the fore and intake sump, numerically simulated the flow patterns of the fore and intake sump before and after the rectification, and concluded that a combination of several engineering
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