Evaluation method for comprehensive performance of outlet channel of pump device

Abstract

The invention discloses a method for evaluating the comprehensive performance of a water outlet channel of a pump device. The method is based on the CFD three-dimensional constant value calculation results of the pump device, and determines five sub-item evaluation indexes of the hydraulic performance of the water outlet channel, and according to the water outlet channel Based on the preliminary design scheme, four sub-item evaluation indicators based on the three-dimensional design of the outlet channel of the pump device are determined; the above-mentioned nine sub-item evaluation indicators of the outlet channel are converted to obtain the objective function of the comprehensive performance of the outlet channel, Thus, the evaluation grade of the comprehensive performance of the outlet flow channel can be obtained. The present invention overcomes the drawbacks of the prior art method of only evaluating the hydraulic performance of the pumping station outlet flow channel, is more conducive to optimizing the water outlet flow channel in the initial stage of the pump station design, can further reduce the energy consumption of the pump station, and achieves the purpose of saving energy and reducing consumption .

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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