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Method for predicting performance of centrifugal fan in high-altitude environment

A centrifugal fan, performance prediction technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve problems such as inaccurate prediction results

Pending Publication Date: 2021-09-07
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a centrifugal fan performance prediction method for high altitude environment, to solve the problem of inaccurate prediction results of existing methods

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  • Method for predicting performance of centrifugal fan in high-altitude environment
  • Method for predicting performance of centrifugal fan in high-altitude environment
  • Method for predicting performance of centrifugal fan in high-altitude environment

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Embodiment Construction

[0036] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] Such as figure 1 As shown, the method of the present embodiment is as follows:

[0038] The present invention provides a method for predicting the performance of a centrifugal fan in a high-altitude environment, comprising the following steps:

[0039] S1: According to the high-altitude atmospheric statics theory, establish the corresponding relationship equation between atmospheric pressure and altitude:

[0040]

[0041] In the formula, h is the altitude above sea level, g is the acceleration due to gravity, T is the atmospheric temperature, and R g is the gas constant, P 0 Atmospheric pressure in plain environment, P h is the atmospheric pressure at an al...

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Abstract

The invention belongs to the technical field of fluid machinery, and provides a method for predicting the performance of a centrifugal fan in a high-altitude environment, which comprises the following steps: S1, a corresponding relation equation between atmospheric pressure and altitude is established according to a high-altitude atmospheric statics theory; S2, a flow field calculation physical model of the centrifugal fan is established, and grid division is performed; s3, boundary conditions of a fan model are defined according to the atmospheric pressure value of the high-altitude area; s4, a computational fluid dynamics (CFD) method is used for conducting steady-state simulation calculation on the fan flow fields under different working conditions, and after calculation convergence, the average wind speed, pressure and impeller torque of an outlet of the fan model are output; and S5, fan performance parameters are calculated, and a centrifugal fan performance curve in the high-altitude environment is drawn. According to the method, the accuracy of predicting the performance of the centrifugal fan in the high-altitude environment can be improved, and the method has guiding significance on fan type selection and working condition adjustment in a high-altitude area.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery, and in particular relates to a method for predicting the performance of a centrifugal fan in a high-altitude environment. Background technique [0002] As an important ventilation, dust removal and cooling equipment, centrifugal fans are widely used in factories, mines and tunnels. However, as the altitude rises, low pressure, hypoxia, cold and dry climate environment greatly affect the normal operation of electrical and mechanical equipment, making the operation performance of centrifugal fans in high altitude areas different from that in plain areas, and resulting in power failure of the fans. Insufficient phenomena restrict the efficient use of resources and safe production in high-altitude areas. Therefore, accurately predicting the performance parameters of centrifugal fans in high-altitude environments is of great significance for fan selection and working condition adjustment in h...

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Application Information

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IPC IPC(8): G06F30/23G06F30/28G06F119/14
CPCG06F30/23G06F30/28G06F2119/14
Inventor 刘学刘剑刘丽
Owner LIAONING TECHNICAL UNIVERSITY
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