Numerical Simulation on Axial Flow Fan Performance with Changing Tip Clearance

Zhou Ye; Hai Yang Zhao; Lu Zhang; Chun Li; Wei Gao

doi:10.4028/www.scientific.net/AMR.732-733.577

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Numerical Simulation on Axial Flow Fan Performance with Changing Tip Clearance

Abstract:

Taking the relative tip clearance as the variable, we numerically simulated the effect of tip clearance size on the performance of a straight-blade axial flow fan using the 3-D viscous flow solver. The tip clearance is referenced in the relative value. By comparing the flow field corresponding to five different values of the tip clearance 0, 0.5%, 1.0%, 1.5% and 2.0% with other parameters kept constant, we concluded that the changing of the tip clearance has a great influence on the performance of the axial flow fan. Both the efficiency and the total pressure decrease with the increase of the tip clearance.