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Setting method for axial flow pump space guide vane inlet setting angle

A space guide vane and placement angle technology, which is applied to axial flow pumps, components of pumping devices for elastic fluids, pumps, etc., can solve the problems of reducing the efficiency of axial flow pumps and increasing impact losses

Active Publication Date: 2021-06-04
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for setting the placement angle of the guide vane inlet in the axial flow pump space, so as to solve the large deviation between the result obtained by the calculation method of the guide vane inlet placement angle in the prior art and the actual value, which leads to the impact at the guide vane inlet The technical problem of increasing the loss and reducing the efficiency of the axial flow pump

Method used

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  • Setting method for axial flow pump space guide vane inlet setting angle
  • Setting method for axial flow pump space guide vane inlet setting angle
  • Setting method for axial flow pump space guide vane inlet setting angle

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Embodiment 1

[0042] Embodiments of the present invention provide a method for setting an axial flow pump space guide vane inlet placement angle, comprising the following steps:

[0043] S1. Model the fluid domain of the impeller, then divide the grid, and then set the boundary conditions, assuming conditions: steady or unsteady, incompressible; turbulence model: RNG k-ε; inlet: mass flow; outlet: Opening (free outlet flow); wall: No slip (no slip); near wall area: standard wall function;

[0044] S2. Calculate the component velocity v in the circumferential direction of the impeller outlet u2 and shaft speed v m2: Take the three cylindrical layers a, b and c at the position near the hub of the impeller near the exit, the middle of the flow channel and the position of the wheel rim, and each cylindrical layer is divided into 200 parts equally. According to the calculation results of computational fluid dynamics, the different Circumferential direction component velocity v of position u2 ...

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Abstract

The invention discloses a setting method for an axial flow pump space guide vane inlet setting angle, and belongs to the technical field of axial flow pump guide vane design. The method comprises the following steps that S1, an impeller fluid domain is modeled, then grids are divided, and a boundary condition is set; S2, a component velocity vu2 and an axial surface velocity vm2 in the circumferential direction of an outlet of an impeller are calculated; and S3, weighted average calculation on the vu2 and the vm2 of the different cylindrical surfaces is calculated with respect to corresponding perimeters to obtain an average value of the vu2 and the vm2 on each cylindrical surface.

Description

technical field [0001] The invention belongs to the technical field of axial-flow pump guide vane design, and in particular relates to a method for setting the placement angle of an axial-flow pump space guide vane inlet. Background technique [0002] At present, the guide vane design of axial flow pump generally adopts the streamline method, which adopts the assumption of cylinder independence, and solves the guide vane inlet placement angle for each cylindrical layer separately. The above calculation method of guide vane inlet placement angle has the following disadvantages: [0003] The whole design is based on the basic assumption of cylinder independence, that is, the flow state of each cylinder layer is independent of each other, and there is no radial flow in the flow process. However, in the actual flow process, the potential lift near the rim is much larger than that near the hub. Potential head, there is inevitably obvious radial flow in the flow channel; [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D3/00F04D29/18F04D29/54
CPCF04D3/005F04D29/181F04D29/548
Inventor 郭艳磊杨从新王岩黎义斌王秀勇
Owner LANZHOU UNIVERSITY OF TECHNOLOGY