An investigation of the effect of uneven blade spacing on the tonal noise generated by a mixed flow fan

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New Zealand Acoustics Journal: Volume # 27 Issue # 3

Published Date: 01-07-2014

Abstract

The current study investigates the flow performance and sound quality for a standard and an alternative compressor design for use in a Dyson desk fan. The alternative compressor has an uneven blade spacing to spread the associated energy of a single blade passing frequency to several frequencies in order to improve sound quality. The flow performance and acoustic signature for the two designs are compared both as a standalone compressor and installed in product. A dedicated sound preference model was developed to objectively evaluate the acoustic signature of both designs. This methodology can be used to help optimise compressor design in terms of user preference.

Related Authors: Ash Symes, Jeremy Hurault, Ludovic Desvard, Mohamed Zamzam, and Muhammad Affendi Bin