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Spatial Correlation of Turbulent Flow Pressure Fluctuations Downstream of an Obstruction
Technical Paper
2021-01-1049
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The structural excitation by turbulent flow pressure fluctuations continues to be an important part of vehicle NVH analysis and design. Much of the analytical work on turbulent flow has been limited to flow over smooth, flat surfaces. Measurements and CFD analyses show a significantly different pressure spectrum for flows over an obstruction. The coupling of the turbulent pressure excitation to the structural vibration and transmitted sound depends on the spatial matching between the source and response fields. This paper develops an analytical model for the spatial correlation of turbulent flow pressure fluctuations downstream of an obstruction. Such a model is useful in the early design stage of a vehicle and is compatible with SEA models of the fluid structure interaction.
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Citation
DeJong, R., Tubergen, R., and Willson, A., "Spatial Correlation of Turbulent Flow Pressure Fluctuations Downstream of an Obstruction," SAE Technical Paper 2021-01-1049, 2021, https://doi.org/10.4271/2021-01-1049.Also In
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