Research On Feature Of Rotating Stall And The Inlet Vortex In Centrifugal Fans

In t his p aper r otating s tall a nd t he inlet v ortex in c entrifugal fans with inlet v ane control has been studied in laboratory. The Harmonic Wavelet is firstly used for time-frequency analysis and feature extraction of pulsation amplitude and frequency and development of rotating stall and inlet vortex. The development rule of rotating stall and inlet vortex and the effect to fans performance from the two has been found. Experimental study shows: it was able to distinguish between rotating stall and the inlet vortex., and the regimes of the two were clearly separated.Shang Jian-yu (Engineering Thermophysics) Directed By prof. Wang Song-ling...