Body-fitted grid generation in double-channel pump impeller and CFD analysis
ZHAO Bin-juan1, YUAN Shou-qi2, LIU Hou-lin2, HUANG Zhong-fu3, TAN Ming-gao2
1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Technical and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 3.School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China
Abstract：Based on the differential equation method,a body-fitted grid generation code was developed for the 3-D body-fitted structured grids.Laplace equation with additional source terms was employed,and source terms were built according to Thompson and Sorenson′s thought by interpolation of exponential function.With the grid generated by this method,the turbulent inner flow within the double-channel impeller was calculated.It is concluded that the grid has good quality to improve the efficiency and precision of inner flow calculation within the double-channel impeller,its size can be human controlled,and grid lines are orthogonal to boundary walls to feed in turbulent wall boundary conditions conveniently.After approp-riate adjustment,the code can also be used to generate the mesh of other irregular flow channels.
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