Optimization Research of Centrifugal Fan with Different Blade Number and Outlet Blade Angle

Author

Wang, Songling ; Zhang, Lei ; Wu, Zhengren ; Qian, Hongwei

Author_Institution

Dept. of Power Eng., North China Electr. Power Univ., Baoding

fYear

2009

fDate

27-31 March 2009

Firstpage

1

Lastpage

4

Abstract

The characteristics of the three-dimension flow field of the G4-73 centrifugal fan were numerically simulated based on the k-epsiv turbulence model with the Fluent, and then verified the simulating result by experiment. Taking the efficiency eta maximizing as a function goal, while the blade number and the angle of blade outlet as the variable quantities, the fan impeller parameters are optimized based on least squares method. The optimizing results showed that the performance of centrifugal fan was 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.

Keywords

blades; fans; impellers; jets; least squares approximations; thermal power stations; turbulence; vortices; wakes; Fluent; G4-73 centrifugal fan; blade number; energy loss; fan impeller parameters; k-epsiv turbulence model; least squares method; outlet blade angle; secondary flow vortex; thermal power plant; three-dimension flow field characteristics; volute tongue; wake-jet flow; Blades; Fans; Impellers; Least squares methods; Navier-Stokes equations; Numerical simulation; Optimization methods; Power engineering; Power generation; Tongue;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific

Conference_Location

Wuhan

Print_ISBN

978-1-4244-2486-3

Electronic_ISBN

978-1-4244-2487-0

Type

conf

DOI

10.1109/APPEEC.2009.4918577

Filename

4918577