At the same time, the diversion of the tail will appear after the whirlpool, adjusting the Y shaped diversion pier position, height, angle, and length to adjust the flow.
Adopting the method of the Fluent software to analyze the geometrical parameters of the Y shaped diversion piers and analyzing the rectification effect, it is shown that the Y shaped diversion piers have a good effect on the whole dispersion water flow. ĬFD technology has become mature, and numerical simulation for pumping stations has also emerged, so the flow of the former pool and its impact were predicted and evaluated through using numerical simulation technology. Analyzing and comparing all kinds of optimized measures, we will expound the advantages and disadvantages of various schemes in detail.
Combined with the practice in engineering, we made a conclusion about a series of measures to optimize the flow pattern of the forebay, including selecting the bottom and the column, adding the pier, and placing the water pressure plate and the diversion pier. The uniformity and stability of the fluid in the forebay are studied by the size, strength, uniformity of the velocity, and the form of water connection.
Based on the hydraulic model test of a large-scale urban water source pumping station, the eight-shaped diversion pier, non-full-section bottom grill, and vanishing plate are proposed to improve the influent flow regime. The characteristics of lateral flow regime and flow characteristics and the principle of rectification are described in detail, and several flow optimization measures used commonly and research methods are also analyzed in detail. Setting the bottom and the columns in the forebay can improve the flow, and then we can prepare the brewing in the pool before the whirlpool and swing and other bad flow.
After that, the corresponding rectification measures were put forward, and various engineering measures of the geometric parameters were adjusted to change its influence on the improvement of the flow regime. We studied the influencing factors of the flow regime of the forebay and the causes of the bad flow. In many pumping stations during operation, many phenomena are related to poor water flow, such as severe vibration, low efficiency, and serious cavitation. It is very important for the pump station to be stable and safe to operate. To operate the pump safely, the water flow in the foreland is a very important factor. The proposed scheme (“T” diversion pier) is regarded as the pumping station flow control measures. Based on the analysis and comparison of the results during the test of numerical simulation and model test, the stability of the rectification measures is considered after taking into consideration the results of the uniformity test of the velocity distribution of the surface layer, the bottom layer, and the front section of each scheme. For the numerical simulation, the corresponding three-dimensional model is established by UG solid modeling software, and then the computational fluid is simulated numerically with CFX. In this paper, taking a lateral inlet pump station as an example, we study the nonmeasures and five rectification measures-“Y” type diversion pier, “T” shaped diversion pier, narrow bottom hole, high and wide bottom, and diversion wall-through adopting the method of numerical simulation and model test. Actual test observations and theoretical studies have shown that poor precursors produce backflow, vortex, and water flow disturbances in the forebay water. The forebay of pumping stations is an important hydraulic structure that connects the channel with the inlet channel.