A Numerical Prediction Method for Flow-Induced Noise of Centrifugal Pumps

A technology of inducing noise and numerical prediction, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of not considering the structure of the pump body, and achieve the effect of reducing the number of tests, improving the design quality, and shortening the research and development cycle.

Active Publication Date: 2016-08-17
JIANGSU UNIV
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Problems solved by technology

[0005] Technical problem to be solved by the present invention: Aiming at the problems existing in the prior art, the present invention provides a numerical prediction of the flow-induced noise of the centrifugal pump by calculating the sound source characteristics of the flow noise on the basis of the experimental results of the performance test of the centrifugal pump method, and this method can better overcome the shortcomings of traditional calculation methods that do not consider the influence of pump body structure on sound propagation and ignore eddy current broadband noise.

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] Depend on figure 1 , figure 2 As shown, a numerical prediction method of centrifugal pump flow-induced noise, using the combination of large eddy simulation and acoustic finite element and coupled structural vibration, and in the process of centrifugal pump flow noise calculation, the combination of ACTRAN Aero-Acoustics module and Vibro-Acoustics Solve the design conditions (Q=25m 3 / s), including the following steps:

[0033] Step 1) Perform external characteristic tests on the model pump to obtain the boundary condition data required for numerical calculation: inlet and outlet flow, pressure, etc., as well as pump lift, efficiency, and shaft power curves.

[0034] Step 2) Set the boundary conditions according to the test data: the inlet flow rate is 25m3 / h and the outlet pressure is 330kPa. Model the fluid domain, calculate the f...

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Abstract

The invention discloses a numerical prediction method of the flow-induced noise of a centrifugal pump. The invention provides a numerical prediction method of the flow-induced noise of a centrifugal pump by calculating the sound source characteristics of the flow noise on the basis of the test results of the performance test of the centrifugal pump. Moreover, this method can better overcome the shortcomings of the traditional calculation method that does not consider the influence of the pump body structure on the sound propagation and ignores the broadband noise of the eddy current. Applying the analysis of the internal flow of the centrifugal pump and the calculation results of the far-field noise value to the low-noise hydraulic design of the centrifugal pump can reduce the number of tests, shorten the development cycle, save development costs, and effectively improve the design quality of the centrifugal pump; fluid grid and acoustics The interpolation method between the grids can preserve the sound source information of the flow field calculation to the greatest extent; the GREEN analysis can be used to obtain the contribution of different parts of the shell to the noise. Research on this can be used for the preliminary design or Post-modification for optimization.

Description

technical field [0001] The invention relates to a numerical prediction method of flow-induced noise of a centrifugal rotating machine, in particular to a numerical prediction method of hydraulic noise caused by a flow phenomenon in a centrifugal pump. Background technique [0002] In recent years, noise pollution has become one of the world's three major pollutions alongside air pollution and water pollution, affecting people's physical and mental states. The noise emitted by general mechanical devices has become a public nuisance and has attracted the attention of the society. Many countries have formulated many laws and standards, and proposed the limit allowable value of vibration and noise. Noise reduction has become an important factor restricting product quality. [0003] As an important energy conversion device and fluid conveying equipment, centrifugal pumps are widely used in various sectors of the national economy, and their noise has become one of the main noise ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 司乔瑞衡亚光袁寿其袁建平洪锋
Owner JIANGSU UNIV
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