A New Design Method for Airfoil of Bidirectional Axial Flow Pump

Abstract

The invention provides a design method for a novel bi-directional axial flow pump airfoil profile. The method comprises the steps that airfoil profile coordinates of the different positions from the wheel hub to the wheel rim of a vane of a common axial flow pump are measured through a three coordinate measuring instrument, a corresponding airfoil profile is drawn on an xy coordinate axis, and an original airfoil profile is obtained; on the xy coordinate axis, the front edge point A of the bone line of the original airfoil profile is placed at the origin (0,0), and the original airfoil profile is enlarged to serve as a forward airfoil profile; the original airfoil profile is shrank, and an airfoil profile which is centrosymmetric to the shrank original airfoil profile about the origin serves as a reverse airfoil profile; translation is performed on the reverse airfoil profile to enable the front edge point B of the bone line of the reverse airfoil profile to be coincide with the back edge point C of the bone line of the forward airfoil profile, a chord line formed by connecting a back edge point E and a front edge point D passes though the origin and is parallel to an x axis, and the novel bi-directional axial flow pump airfoil profile can be obtained after arc lines near a back edge point B are processed. The design method for the novel bi-directional axial flow pump airfoil profile is simple and easy to operate; compared with an S-shaped symmetric airfoil profile, when the flow comes in the reverse direction, the novel bi-directional axial flow pump airfoil profile is more in accordance with the flow characteristics of hydromechanics, and the anti-cavitation property is relatively better.

Description

technical field [0001] The invention relates to the technical field of bidirectional axial flow pump airfoil design, in particular to a novel bidirectional axial flow pump airfoil design method based on ANSYS simulation design. Background technique [0002] In some pumping stations along rivers and lakes, coastal areas, and South-to-North Water Transfer Projects, it is often necessary to achieve water diversion and drainage through two-way pumping. At present, there are three commonly used ways to realize the two-way pumping function: to change the channel through the gate station to realize the two-way pumping, such as the Jiangdu pumping station; Wait for the pumping station; turn the blade of the one-way pump 180° and reverse the impeller to achieve it, such as the Qinhuai Xinhe pumping station. [0003] Ordinary axial flow pumps with unidirectional airfoils can also achieve reverse pumping when the impeller is reversed, but because the airfoil of the blade is in the rev...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the common axial flow pump airfoil existing in the prior art, it can only achieve good results when it is running in the forward direction, and vibration, cavitation, noise, and symmetrical S-shaped airfoils have low efficiency and anti-steam during reverse operation. Corrosion performance is relatively poor and other problems; the invention provides a novel bidirectional axial flow pump airfoil design method, the axial flow pump impeller using the airfoil design method can achieve higher efficiency and comprehensive performance when operating in both directions

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