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Study on the Optimization Design of the Impeller for G4-73 Centrifugal Fan

Author: ZuoHongWei
Tutor: WangSongLing；LiChunZuo
School: North China Electric Power University (Hebei)
Course: Fluid Machinery and Engineering
Keywords: parameters optimization centrifugal fan numerical simulation least square method MATLAB
CLC: TK223.26
Type: Master's thesis
Year: 2009
Downloads: 155
Quote: 1
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Abstract


In this paper the three-dimensional internal flow field of G4-73No.8D centrifugal fan is investigated using k ?εturbulence model by FLUENT software. The accuracy of numerical simulation is verified by experiment. Based on the fan performance parameters from numerical simulation for different combine of blade number and blade outlet angle, the fan impeller parameters are optimized by means of the least square method, and the optimization results are verified by numerical simulation. The results show that the performance of optimized fan is improved by lowering the energy loss which caused by the secondary flow vortex, the volute tongue, the wake-jet and the angle of attack. After the optimization, the total pressure and efficiency increased 3.7% and 0.5% respectively. The results obtained in the paper have some reference value on the optimization and reformation for larger flow-rate and pressure of the similar types of fans.

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