Spatial distribution of pressure resonance in compressible cavity flow
Abstract
The development of the unsteady pressure field on the floor of a rectangular cavity was studied at Mach 0.9 using high-frequency pressure-sensitive paint. Power spectral amplitudes at each cavity resonance exhibit a spatial distribution with a streamwise-oscillatory pattern; additional maxima and minima appear as the mode number is increased. This spatial distribution also appears in the propagation velocity of modal pressure disturbances. This behavior was tied to the superposition of a downstream-propagating shear-layer disturbance and an upstream-propagating acoustic wave of different amplitudes and convection velocities, consistent with the classical Rossiter model. The summation of these waves generates a net downstream-traveling wave whose amplitude and phase velocity are modulated by a fixed envelope within the cavity. This traveling-wave interpretation of the Rossiter model correctly predicts the instantaneous modal pressure behavior in the cavity. Here, subtle spanwise variations in the modal pressure behavior were also observed, which could be attributed to a shift in the resonance pattern as a result of spillage effects at the edges of the finite-width cavity.
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1459986
- Report Number(s):
- SAND2018-4314J
Journal ID: ISSN 0022-1120; applab; 662694
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Fluid Mechanics
- Additional Journal Information:
- Journal Volume: 848; Journal ID: ISSN 0022-1120
- Publisher:
- Cambridge University Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Casper, Katya Marie, Wagner, Justin L., Beresh, Steven J., Spillers, Russell Wayne, Henfling, John F., and Dechant, Lawrence J. Spatial distribution of pressure resonance in compressible cavity flow. United States: N. p., 2018.
Web. doi:10.1017/jfm.2018.346.
Casper, Katya Marie, Wagner, Justin L., Beresh, Steven J., Spillers, Russell Wayne, Henfling, John F., & Dechant, Lawrence J. Spatial distribution of pressure resonance in compressible cavity flow. United States. https://doi.org/10.1017/jfm.2018.346
Casper, Katya Marie, Wagner, Justin L., Beresh, Steven J., Spillers, Russell Wayne, Henfling, John F., and Dechant, Lawrence J. Fri .
"Spatial distribution of pressure resonance in compressible cavity flow". United States. https://doi.org/10.1017/jfm.2018.346. https://www.osti.gov/servlets/purl/1459986.
@article{osti_1459986,
title = {Spatial distribution of pressure resonance in compressible cavity flow},
author = {Casper, Katya Marie and Wagner, Justin L. and Beresh, Steven J. and Spillers, Russell Wayne and Henfling, John F. and Dechant, Lawrence J.},
abstractNote = {The development of the unsteady pressure field on the floor of a rectangular cavity was studied at Mach 0.9 using high-frequency pressure-sensitive paint. Power spectral amplitudes at each cavity resonance exhibit a spatial distribution with a streamwise-oscillatory pattern; additional maxima and minima appear as the mode number is increased. This spatial distribution also appears in the propagation velocity of modal pressure disturbances. This behavior was tied to the superposition of a downstream-propagating shear-layer disturbance and an upstream-propagating acoustic wave of different amplitudes and convection velocities, consistent with the classical Rossiter model. The summation of these waves generates a net downstream-traveling wave whose amplitude and phase velocity are modulated by a fixed envelope within the cavity. This traveling-wave interpretation of the Rossiter model correctly predicts the instantaneous modal pressure behavior in the cavity. Here, subtle spanwise variations in the modal pressure behavior were also observed, which could be attributed to a shift in the resonance pattern as a result of spillage effects at the edges of the finite-width cavity.},
doi = {10.1017/jfm.2018.346},
journal = {Journal of Fluid Mechanics},
number = ,
volume = 848,
place = {United States},
year = {2018},
month = {8}
}
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Works referencing / citing this record:
Fluid–Structure Interactions on a Tunable Store in Complex Cavity Flow
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