Measurement and analysis of tip clearance unsteady flow spectrum in axial-flow fan rotor

Abstract

The dynamic pressure measurement device and test technology are described in this study. The tip clearance unsteady flow development from the inlet to the outlet of an axial-flow rotor was revealed by analyzing pressure frequency spectrum acquired from measuring the unsteady pressure field of the tip endwall. The experiment provides test basis for thoroughly understanding the tip clearance unsteady flow and building interaction models of tip clearance flow and main flow.

Keywords

axial flow fan / tip clearance flow / unsteady flow spectrum properties