The effects of tip clearance on the noise of low pressure axial and mixed flow fans
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2022, Measurement: Journal of the International Measurement ConfederationCitation Excerpt :The noise of the axial fan can be separated into mechanical noise, electromagnetic noise, and aerodynamic noise [1,2,10,11]. A large part of the noise emanated by the blade is the aerodynamic noise [7,12–15]: the turbulent ingestion (TI) noise, the turbulent boundary layer (TBL) noise, separated flow (SF) noise, vortex-shedding (VS) noise, and tip-leakage flow (TF) noise [13,15]. The radiation feature and the aerodynamic noise generation mechanism of the rotating noise sources can be investigated further based on the noise source localization [9,16].
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