Journal article
Surface pressure spectrum variation with Mach number on a CD airfoil
S Shubham, RD Sandberg, S Moreau, H Wu
Journal of Sound and Vibration | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD | Published : 2022
Abstract
The surface pressure spectrum characteristics are studied on a Controlled Diffusion airfoil at varying Mach numbers and a fixed Reynolds number. Compressible large eddy simulation datasets have been used for this analysis. The study focusses on the noise generation mechanism and the source locations responsible for it. A mid-high frequency hump is observed for the higher Mach number cases in the pressure spectrum and the amplitude of this observed hump increases with Mach number. To investigate the cause of this hump, different hydrodynamic and acoustic pressure modes traveling at specific speeds are obtained by a wavenumber–frequency decomposition. The acoustic component originating from th..
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Awarded by Office of Naval Research
Funding Acknowledgements
The authors are grateful for the funding provided by the Australian Research Council, Discovery Project Grant DP180100898. This work was also partly funded by the U.S. Office of Naval Research Global (ONR Global) under NICOP Grant N62909-17-1-2083. We gratefully acknowledge the support from Dr. Ki-Han Kim (ONR) and Dr. Sung-Eun Kim (ONR Global, Tokyo) . This work was supported by resources provided by the Pawsey Supercomputing Centre with funding from the Australian Government and the Government of Western Australia. This project was undertaken with the assistance of resources and services from the National Computational Infrastructure (NCI) , which is supported by the Australian Government.