Raspet Richard, Yu Jiao, Webster Jeremy
National Center for Physical Acoustics and Department of Physics and Astronomy, University of Mississippi, University, Mississippi 38677, USA.
J Acoust Soc Am. 2008 Mar;123(3):1260-9. doi: 10.1121/1.2832329.
In a previous paper [R. Raspet, et al., J. Acoust. Soc. Am. 119, 834-843 (2006)], a method was introduced to predict upper and lower bounds for wind noise measured in spherical wind-screens from the measured incident velocity spectra. That paper was restricted in that the predictions were only valid within the inertial range of the incident turbulence, and the data were from a measurement not specifically designed to test the predictions. This paper extends the previous predictions into the source region of the atmospheric wind turbulence, and compares the predictions to measurements made with a large range of wind-screen sizes. Predictions for the turbulence-turbulence interaction pressure spectrum as well as the stagnation pressure fluctuation spectrum are calculated from a form fit to the velocity fluctuation spectrum. While the predictions for turbulence-turbulence interaction agree well with measurements made within large (1.0 m) wind-screens, and the stagnation pressure predictions agree well with unscreened gridded microphone measurements, the mean shear-turbulence interaction spectra do not consistently appear in measurements.
在之前的一篇论文[R. 拉斯佩特等人，《美国声学学会杂志》119, 834 - 843 (2006)]中，介绍了一种根据测量的入射速度谱来预测在球形防风罩中测量的风噪声上下限的方法。那篇论文的局限性在于，这些预测仅在入射湍流的惯性范围内有效，并且数据来自并非专门为测试这些预测而设计的测量。本文将先前的预测扩展到大气风湍流的源区，并将这些预测与使用大范围防风罩尺寸进行的测量结果进行比较。根据对速度波动谱的形式拟合来计算湍流 - 湍流相互作用压力谱以及滞止压力波动谱的预测值。虽然湍流 - 湍流相互作用的预测与在大型（1.0米）防风罩内进行的测量结果吻合良好，但滞止压力预测与未加防风罩的网格麦克风测量结果吻合良好，而平均剪切 - 湍流相互作用谱在测量中并非始终出现。
