Study on Separation and Reattachment Flow and Aerodynamics Noise of Multi-Blade Fan (First Report)

- Relationship between Blade Separation and Noise -

Abstract

The purpose of this research is to develop a technology to reduce the noise generated from the fan blades in order to reduce the air-conditioner blowing noise. Then, it aims at clarifying the noise generation mechanism of the cascade. The internal flow was observed in detail by conducting a PIV visualization test for a product equivalent cascade and a cascade with reduced interblade separation. In addition, by carrying out simultaneous measurement of noise, it was found that the size of noise could not be determined only by the size of separation.