Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session ZC44: Jets: Control, Impinging and Swirling
12:50 PM–3:00 PM,
Tuesday, November 21, 2023
Room: 208AB
Chair: Xiaofeng Liu, San Diego State University
Abstract: ZC44.00009 : Statistics and spatio-temporal correlations of wall pressure fluctuations beneath an impinging round jet boundary layer*
2:34 PM–2:47 PM
Presenter:
Jonathan Stocking
(US Naval Research Laboratory)
Authors:
Jonathan Stocking
(US Naval Research Laboratory)
Roger Oba
(US Naval Research Laboratory)
Spatio-temporal correlations between boundary layer coherent structures and acoustic wall pressure data were computed, and turbulent convection velocities from PIV data were found to be in agreement with pressure signals propagating along the sensor array. A cross-wavelet analysis of wall pressure fluctuations was performed to identify dominant modes of the high- and low-frequency components. Spectral properties of wall pressure, including probably density functions and higher order moments, were computed and used to identify hydroacoustic and hydrodynamic contributions. The results are important for future signal processing efforts to isolate flow-induced noise from a target signal and for future flow control strategies. [Work supported by the Office of Naval Research.]
*Supported by the Office of Naval Research and the NRC Research Associateship Program.
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