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Method for analyzing hydraulic loss of centrifugal pump based on entropy theory

A theoretical analysis, centrifugal pump technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of sharp changes and deviations in temperature distribution, and achieve the effect of easy operation

Inactive Publication Date: 2016-05-04
JIANGSU UNIV
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Problems solved by technology

[0031] However, Kock's research results show that there are strong wall effects in the four forms of entropy yield, and the time-averaged term is more obvious
The traditional numerical simulation method can only give relatively accurate solutions in the area far away from the wall, and the closer to the wall area, due to the existence of turbulent boundary layer and thermal boundary layer, the local velocity distribution and temperature distribution change sharply, resulting in the peak value of the entropy yield calculation. results that deviate from the true solution

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  • Method for analyzing hydraulic loss of centrifugal pump based on entropy theory
  • Method for analyzing hydraulic loss of centrifugal pump based on entropy theory
  • Method for analyzing hydraulic loss of centrifugal pump based on entropy theory

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Embodiment Construction

[0071] The present invention will be further described below in conjunction with accompanying drawing:

[0072] Step A) The computational domain of the centrifugal pump is modeled using Creo 3D modeling software. Such as figure 1 As shown, the calculation domain is divided into four parts: inlet pipe 1, impeller 2, volute 3 and outlet pipe 4;

[0073] Step B) Import the calculation domain obtained in step A into ANSYS software for mesh division, such as figure 2 As shown, ICEM in ANSYS is used to divide the inlet pipe 1 and outlet pipe 4 in the computational domain into structured meshes; Meshing is used to divide the impeller 2 and volute 3 in the computational domain into unstructured meshes; at the same time, to meet the standard Wall function vs. Y + According to the requirements, the mesh of the impeller 2 wall and the volute 3 wall are encrypted, and the mesh is divided into 120W, 150W, 177W, and 200W meshes;

[0074] Step C) Using Fluent in ANSYS to carry out the n...

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Abstract

The invention relates to a method for analyzing the hydraulic loss of a centrifugal pump based on an entropy theory. The method comprises the following steps of A, using three-dimensional modeling software for modeling for the computational domain of the centrifugal pump; B, introducing the model of the computational domain obtained in the step A into analysis software for performing mesh dividing; C, performing constant incompressible full flow passage flow field viscous numerical calculation on the computational domain after mesh dividing; D, comparing the lift and efficiency in the numerical calculation result of the step C with the lift and efficiency of the centrifugal pump under design conditions, thus obtaining the mesh dividing with the optimal mesh number; E, based on the mesh dividing with the optimal mesh number obtained in the step D, compiling an entropy generation formula into the post processor of the analysis software by using a programming language, thus obtaining data after entropy analysis; and F, introducing the data after entropy analysis obtained in the step E into data processing software for drawing, and thereby obtaining a corresponding entropy analysis result.

Description

technical field [0001] The invention relates to the technical field related to the internal flow loss mechanism of a fluid machine, in particular to a method for analyzing the hydraulic loss of a centrifugal pump based on the entropy theory. Background technique [0002] As a common rotating machine, centrifugal pump is widely used in various fields of industrial production. Because of its huge energy consumption, it is of great significance to study its energy characteristics and realize energy-saving operation. The literature survey shows that the research on the energy characteristics of centrifugal pumps is mainly analyzed from the perspective of fluid dynamics, mainly based on experimental testing and numerical simulation methods. Numerical simulation is a mature technology in flow field calculation, which can provide more detailed internal flow information than experimental testing and has been widely recognized. [0003] It is not intuitive to analyze the size and lo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 裴吉尹庭赟袁小露袁寿其骆寅司乔瑞
Owner JIANGSU UNIV
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