CUED Publications database

Tonal noise generation mechanisms in low-speed mixed-flow fans

Newman, TJ and Agarwal, A and Dowling, AP and Stimpson, R (2014) Tonal noise generation mechanisms in low-speed mixed-flow fans. 20th AIAA/CEAS Aeroacoustics Conference.

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The applicability of aerospace fan noise prediction theory to low-speed fans operating at low Reynolds numbers is not precisely known. A low-speed mixed-flow fan has been used as the initial test case to understand the dominant noise generating mechanisms in fans of this type. In the absence of a universal transition model for CFD, the possibility of significant laminar flow was considered. A simplified, theoretical model for predicting tonal noise is compared to experimental measurements made in a ducted aeroacoustic performance analysis rig. The flow field was characterised in detail using two-dimensional hotwire measurements.

Item Type: Article
Divisions: Div A > Fluid Mechanics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:54
Last Modified: 22 May 2018 07:57