Method for predicting transient fluid-solid coupling characteristic of centrifugal pump rotor

A fluid-solid coupling and characteristic prediction technology, which is applied in pump control, non-variable pumps, machines/engines, etc., can solve the problems of no experimental verification steps, unpredictable accuracy, etc., and achieve the effect of flexible selection

Active Publication Date: 2013-02-06
JIANGSU UNIV
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Problems solved by technology

At present, among these patents, there is no declared patent on the numerical prediction method of the flow-induced vibration of the centrifugal pump. At the same time, there is no prediction method for the fluid-solid coupling phenomenon of the rotating mach

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  • Method for predicting transient fluid-solid coupling characteristic of centrifugal pump rotor
  • Method for predicting transient fluid-solid coupling characteristic of centrifugal pump rotor
  • Method for predicting transient fluid-solid coupling characteristic of centrifugal pump rotor

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Embodiment Construction

[0016] Below in conjunction with application example accompanying drawing, the present invention will be further described:

[0017] Such as figure 1 As shown, the method for predicting the fluid-structure coupling vibration characteristics of centrifugal pump rotors includes three steps: Step 1: Calculation of transient fluid-structure coupling in one-way and two-way full flow fields; Step 2: Measurement and processing of rotor vibration data; Step 3: Flow Comparison of solid-coupling numerical prediction results with experimental results. Step 1 includes 1.1 initial modeling and grid division of flow field and structure field; 1.2 transient simulation of flow field based on SST turbulence model; 1.3 load transfer process at fluid-solid coupling interface; 1.4 structural dynamics based on finite element method 1.5 Judgment of convergence of fluid-solid coupling calculation; 1.6 Recalculation of fluid grid; 1.7 Physical time identification of coupling calculation. Step 2 inc...

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Abstract

The invention discloses a method for predicting a numerical value of a transient fluid-solid coupling characteristic, and belongs to the technical field relevant to the mechanical flow induced vibration of pumps. The method mainly comprises the following three steps: calculating the transient fluid-solid coupling of an one-way and a bidirectional total fluid fields; measuring and processing the vibration data of a rotor; and comparing a predication result of the numerical value of the transient fluid-solid coupling with an experimental result. An coupling method can be selected flexibly. When the structure deformation quantity is not clear, the one-way coupling analysis is carried out firstly; if the predicted structure deformation has a big influence on the fluid field, the bidirectional coupling analysis is utilized. During the coupling calculation process, firstly, the transient fluid field calculation is carried out, and the load is added to a finite element model through interpolation calculation of an coupling interface so as to carry out a dynamic structural analysis. The convergence of data transmission of the coupling interface is judged, if the coupling calculation is not converged, fluid grids are recalculated according to the structural deformation, and then the coupling iteration for a time step is continued.

Description

technical field [0001] The invention belongs to the technical field related to the incompressible transient turbulent flow field inside the pump machinery and its induced vibration, and introduces the fluid-solid coupling theory and method for calculation and analysis. Background technique [0002] Pumps are important energy conversion devices and fluid delivery equipment, among which centrifugal pumps are the most widely used. Centrifugal pumps are not only used in industrial and agricultural fields such as petroleum, chemical industry, and water conservancy, but also are key equipment in high-tech fields such as aviation, ships, and submarines. Centrifugal pumps will inevitably generate vibration during operation, which will affect the stability and safety of centrifugal pump operation and affect the life of the machine. In defense equipment such as ships and submarines with high concealment, the vibration and noise of centrifugal pumps will directly affect their safety. ...

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Application Information

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IPC IPC(8): F04D15/00
Inventor 裴吉袁寿其王文杰袁建平司乔瑞阳君
Owner JIANGSU UNIV
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