This Part-2 paper applies Part 1’s theory of sheared rapid distortions to compute broadband noise from flow over large roughness elements, and compares those calculations to recent wind-tunnel measurements. The calculations suggest that shear effects are subdominant in the sound-production process. Post-processing of computed results brings out key features of the theory’s non-equilibrium distorting turbulence. A follow-up analysis makes possible the physical interpretation of the measured acoustic spectral densities in terms of the kinematics of the spatially non-uniform carrier flow.
- Noise Control and Acoustics Division
Understanding Roughness Noise: Progress in Analytical Modeling and Testing, Part 2—Comparison of Calculations to Data
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Martinez, R, Uhlman, JS, Ting, CM, Paul, BS, Anderson, JM, Goody, MC, & Stewart, DO. "Understanding Roughness Noise: Progress in Analytical Modeling and Testing, Part 2—Comparison of Calculations to Data." Proceedings of the ASME 2008 Noise Control and Acoustics Division Conference. ASME 2008 Noise Control and Acoustics Division Conference. Dearborn, Michigan, USA. July 28–30, 2008. pp. 153-165. ASME. https://doi.org/10.1115/NCAD2008-73091
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