J Acoust Soc Am. 2011 Dec;130(6):3590-4. doi: 10.1121/1.3652868.

Improved prediction of the turbulence-shear contribution to wind noise pressure spectra.

The Journal of the Acoustical Society of America

Jiao Yu, Richard Raspet, Jeremy Webster, JohnPaul Abbott

PMID: 22225016 DOI: 10.1121/1.3652868

Abstract

In previous research [Raspet et al., J. Acoust. Soc. Am. 123(3), 1260-1269 (2008)], predictions of the low frequency turbulence-turbulence and turbulence-mean shear interaction pressure spectra measured by a large wind screen were developed and compared to the spectra measured using large spherical wind screens in the flow. The predictions and measurements agreed well except at very low frequencies where the turbulence-mean shear contribution dominated the turbulence-turbulence interaction pressure. In this region the predicted turbulence-mean shear interaction pressure did not show consistent agreement with microphone measurements. The predicted levels were often much larger than the measured results. This paper applies methods developed to predict the turbulence-shear interaction pressure measured at the ground [Yu et al., J. Acoust. Soc. Am. 129(2), 622-632 (2011)] to improve the prediction of the turbulence-shear interaction pressure above the ground surface by incorporating a realistic wind velocity profile and realistic turbulence anisotropy. The revised prediction of the turbulence-shear interaction pressure spectra compares favorably with wind-screen microphone measurements in large wind screens at low frequency.

© 2011 Acoustical Society of America

Publication Types

• Journal Article
• Research Support, U.S. Gov't, Non-P.H.S.