A computational study of the effect of windscreen shape and flow resistivity on turbulent wind noise reduction
Issue Date
2011Author
Xu, Ying
Zheng, Zhongquan Charlie
Wilson, D. K.
Publisher
Acoustical Society of America
Type
Article
Article Version
Scholarly/refereed, publisher version
Metadata
Show full item recordAbstract
In this paper, numerical simulations are used to study the turbulentwind noise reduction effect of microphone windscreens with varying shapes and flow resistivities. Typical windscreen shapes consisting of circular, elliptical, and rectangular cylinders are investigated. A turbulent environment is generated by placing a solid circular cylinder upstream of the microphone. An immersed-boundary method with a fifth-order weighted essentially non-oscillatory scheme is implemented to enhance the simulation accuracy for high-Reynolds number flow around the solid cylinder as well as at the interface between the open air and the porous material comprising the windscreen. The Navier–Stokes equations for incompressible flow are solved in the open air. For the flow inside the porous material, a modified form of the Zwikker–Kosten equation is solved. The results show that, on average, the circular and horizontal ellipse windscreens have similar overall wind noise reduction performance, while the horizontal ellipse windscreen with medium flow resistivity provides the most effective wind noise reduction among all the considered cases. The vertical ellipse windscreen with high flow resistivity, in particular, increases the wind noise because of increased self-generation of turbulence.
Description
This is the published version. Copyright 2011 Acoustical Society of America
Collections
Citation
Xu, Ying, Z. C. Zheng, and D. K. Wilson. "A Computational Study of the Effect of Windscreen Shape and Flow Resistivity on Turbulent Wind Noise Reduction." The Journal of the Acoustical Society of America J. Acoust. Soc. Am. 129.4 (2011): 1740. http://dx.doi.org/10.1121/1.3552886
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.