Evaluation method for comprehensive performance of a pump device water outlet runner

Abstract

The invention discloses an evaluation method for comprehensive performance of a pump device water outlet runner. According to the method, based on a CFD three-dimensional constant numerical calculation result of a pump device, sub-item evaluation indexes of five hydraulic performances of a water flow channel are determined, and according to an initial setting scheme of a water outlet flow channel,sub-item evaluation indexes of four structures based on three-dimensional design of the water outlet flow channel of the pump device are determined; And converting the determined 9 sub-item evaluation indexes of the water outlet flow channel to obtain an objective function of the comprehensive performance of the water outlet flow channel, thereby obtaining the evaluation grade of the comprehensive performance of the water outlet flow channel. The defect that only the hydraulic performance of the pump station water outlet flow channel is evaluated in the prior art is overcome, the optimal selection of the water outlet flow channel in the initial setting stage of the pump station is facilitated, the energy consumption of the pump station can be further reduced, and the purposes of energy conservation and consumption reduction are achieved.

Description

technical field [0001] The invention relates to the field of pumping station design, in particular to a method for evaluating the comprehensive performance of a water outlet channel of a pumping device. Background technique [0002] The water outlet channel is an important water outlet structure of the low-lift pumping station. It is a connecting channel connecting the outlet of the pump guide vane body and the outlet pool. Its main function is to diffuse the relatively high-speed water flow at the outlet of the guide vane body and recover rotational kinetic energy; The hydraulic performance of the pump directly affects the energy efficiency of the low-head pump device. The lower the head of the pump device, the greater the impact of the outlet channel on the energy performance of the pump device. [0003] At present, in the preliminary design of the pumping station, the selection of the outlet flow channel is usually judged by the size of the hydraulic loss. Designers or sc...

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Problems solved by technology

[0003] At present, in the preliminary design of the pumping station, the selection of the outlet flow channel is usually judged by the size of the hydraulic loss. Designers or scientific researchers often independently use the outlet flow channel as the calculation object to calculate the size of the hydraulic loss. This calculation method ignores the There are obvious technical defects in the comparison and selection of multiple schemes for judging the outlet flow channel based on the mutual interference effect of the outlet flow channel and the pump internal flow.

As an important part of the structural design of the pumping station, the outlet channel is obviously insufficient if only the hydraulic loss of the outlet channel is used as the basis for judging in the preliminary design stage of the pumping station, and the impact of the structural size of the outlet channel on the pumping station's civil construction investment is obviously insufficient

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