Numerical simulation of two 2phase flow in centrifugal pump and analysis of fluid2structure interaction of the impeller
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Abstract:
Based on the N2S equation and the traditional k 2E turbulent model, the SIM PLE method was applied to simulate the three 2dimensional solid 2liquid two 2phase flow field in the centrifugal pump. T he distributions of internal pressure and particle concentration were obtained under different concentrations of the solid phase in the centrifugal pump. The structure of centrifu2 gal impeller was analyzed based on the fluid2structure interaction theorem. T he multi 2physical co 2simulation platform ANASYS Workbench was used, and the numerical simulation of centrifugal impeller structure was conducted base on the one 2way fluid 2 structure interaction technology. The equivalent stress and deformation under the different concentrations of the solid phase and same working conditions were determined. The results showed that the volute pressure and solid volume concentration increase with the increasing of spiral radius from the entrance, and the uneven distribution of regional concentration appears at the tongue. Under all the calculation conditions, the variation trends of equivalent stress and total deformation of the impeller are ba 2 sically the same. The stress distribution of the impeller is uneven and local stress concentration occurs. The greater the solids volume concentration, the higher the deformation of centrifugal pump impeller.
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