Spatial Correlation of Turbulent Flow Pressure Fluctuations Downstream of an Obstruction 2021-01-1049
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.
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. Download Citation
Author(s):
Richard DeJong, Renard Tubergen, Abigail Willson
Affiliated:
Calvin Engineering, Calvin University, Pennsylvania State University
Pages: 6
Event:
Noise and Vibration Conference & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Turbulence
Pressure
Computational fluid dynamics
Vibration
Noise, Vibration, and Harshness (NVH)
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