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...

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