摘要
Based on the boundary condition of field engineering, numerical simulations of28 conditions of existing diffusers of 3 structure types were investigated by ComputationalFluid Dynamics software package, and there were the problems of larger structure resistanceand lower diffusing efficiency of these diffusers by analysis of CFD results.Thestructure outlines of the energy-saving diffuser were constructed by the application ofstream function and potential function superimposing.On the basis of numerical simulationsof energy-saving diffusers of 5 area-enlarging ratios, structural resistances and diffusingefficiencies of 5 energy-saving diffusers were comparatively analyzed, and therange from 2.00 to 2.31 of the rational area-enlarging ratio of energy-saving diffusers wasderived.The optimization area-enlarging ratio of the energy-saving diffuser was presently2.28 through comparable analysis.From the above, the results show that the coefficient ofperformance of the energy-saving diffuser is better than 3 existing diffusers.
Based on the boundary condition of field engineering, numerical simulations of 28 conditions of existing diffusers of 3 structure types were investigated by Computational Fluid Dynamics software package, and there were the problems of larger structure resistance and lower diffusing efficiency of these diffusers by analysis of CFD results. The structure outlines of the energy-saving diffuser were constructed by the application of stream function and potential function superimposing. On the basis of numerical simulations of energy-saving diffusers of 5 area-enlarging ratios, structural resistances and diffusing efficiencies of 5 energy-saving diffusers were comparatively analyzed, and the range from 2.00 to 2.31 of the rational area-enlarging ratio of energy-saving diffusers was derived. The optimization area-enlarging ratio of the energy-saving diffuser was presently 2.28 through comparable analysis. From the above, the results show that the coefficient of performance of the energy-saving diffuser is better than 3 existing diffusers.
基金
Supported by the National Natural Science Foundation of China(50974060)
the Scientific Research Fund of Hunan Provincial Education Department(09CY014)
the Doctoral Fund of Hunan University of Science and Technology
