Numerical predication method for radiation noise of flow-induced structure of multi-stage centrifugal pump
A radiated noise and numerical prediction technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of reducing costs, shortening the research and development cycle, only considering the vibration and radiation noise of the flow noise structure, and reducing the number of tests. , The effect of shortening the R&D cycle and avoiding information loss
Active Publication Date: 2017-03-15
JIANGSU UNIV
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Applying this numerical prediction method to the optimal design of low-noise multi-stage centrifugal pumps can solve the problem that traditional centrifugal pump noise prediction values only consider flow noise while ignoring structural vibration radiation noise, shorten the development cycle and reduce costs
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[0035] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] (1) A M220-7-12 multistage centrifugal pump is used as a model pump to carry out the numerical prediction of the flow-induced structural radiation noise of the multistage centrifugal pump. The whole prediction process is as follows: figure 1 shown. First, a multi-stage centrifugal pump test bench is built in a semi-anechoic chamber, such as Image 6 shown.
[0037] Secondly, the external characteristic experiment of multi-stage centrifugal pump is carried out to obtain the boundary conditions required for numerical calculation of the flow field, such as inlet pressure and outlet flow, and at the same time, the curve of the head, efficiency, and shaft power of the model pump with the flow rate is obtained;
[0038] (2) The boundary conditions obtained from the experiment of the external characteristic...
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The invention discloses a numerical predication method for radiation noise of a flow-induced structure of a multi-stage centrifugal pump. The numerical predication method comprises the following steps of: carrying out an external characteristic experiment to obtain boundary conditions needed by flow-field calculation; modeling a flow-field calculation domain of the multi-stage centrifugal pump, carrying out grid division, adopting a CFD method, utilizing the boundary conditions obtained by the external characteristic experiment to carry out steady calculation of the flow field, comparing a result of flow-field calculation with a result of the external characteristic experiment, and verifying the accuracy of the numerical calculation domain and the boundary conditions; carrying out three-dimensional modeling on the structure domain of the multi-stage centrifugal pump, and establishing an acoustic model of the radiation noise of the multi-stage centrifugal pump structure; and deriving pressure information of a structure wall surface from the result of unsteady flow-field calculation, loading the pressure information onto a structure body, and carrying out calculation on the radiation noise. The numerical predication method disclosed by the invention is applied to a low-noise optimized design of the multi-stage centrifugal pump, and has the advantages that the development design period of the multi-stage pump can be shortened, the cost can be saved and the designing efficiency and quality of the low-noise multi-stage pump can be improved.
Description
technical field [0001] The invention relates to a multistage pump radiation noise numerical prediction method, in particular to a multistage centrifugal pump flow-induced structure vibration radiation noise numerical prediction method, which solves the problems of long development period, high cost and low efficiency of traditional low-noise centrifugal pumps. [0002] technical background [0003] As an important equipment for conveying liquid and pressurizing, multistage centrifugal pump is widely used in various fields of national economy. Due to the dynamic and static interference between the impeller and the guide vane of the multistage pump, and there is also a strong interstage coupling effect, the internal flow of the multistage centrifugal pump is complicated, and the intensity of the pressure pulsation is relatively large, which finally manifests as the structural vibration of the pump body and the vibration of the pump body. Externally radiated noise. Especially i...
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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20G06F2119/10
Inventor 林刚司乔瑞袁建平张克玉黄凯乐
Owner JIANGSU UNIV
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