Flow-induced pressure oscillations in shallow cavities

Heller, H.; Holmes, D. Graham; Covert, Eugene E.

doi:10.1016/0022-460x(71)90105-2

Cited by 350 publications

(120 citation statements)

References 4 publications

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“…Rossiter [1] and Heller et al [2] proposed a formula predicting the tones of shallow cavities. Tam et al [3] proposed an other model taking into account more flow characteristics including the shear layer thickness, and the acoustics reflections, agreeing well with the experiments.…”

Section: Standing Waves Modelling Of Transonic Shallow Cavity Flowsmentioning

confidence: 99%

Modelling of Transonic Shallow Cavity Flows

Loupy

Barakos

2017

35th AIAA Applied Aerodynamics Conference

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Section: Standing Waves Modelling Of Transonic Shallow Cavity Flowsmentioning

confidence: 99%

Modelling of Transonic Shallow Cavity Flows

Loupy

Barakos

2017

35th AIAA Applied Aerodynamics Conference

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“…The pressure fluctuations inside the cavity consist mainly of discrete resonances whose frequency, amplitude, and harmonic properties depend on the cavity geometry and external flow conditions. 9) Previous study 11) indicated that the oscillation frequencies could be predicted by the modified Rossiter equation reasonably well. However, the measurements of the amplitude of the fluctuating pressure in and near the cavities are seriously lacking.…”

Section: Introductionmentioning

confidence: 99%

Geometric Effect on Compressible Rectangular Cavity Flows.

Chung

2002

Trans. Japan Soc. Aero. S Sci.

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Experiments were performed to study the geometric effects on the compressible rectangular cavity flows at Mach 0.33, 0.62, and 0.82. Typical characteristics of mean surface pressure distributions show a slight pressure variation near the front face, a local peak surface pressure ahead of the rear corner, and a low pressure immediately downstream of the cavity. The length-to-width ratio of a cavity has a strong effect on the recompression and downstream expansion near the rear face, and the Mach number effect is minimized. Surface pressure fluctuation distributions show a damping near the leading edge at a higher freestream Mach number, a minor peak near the middle of the cavity floor, an increase toward the cavity rear face, and a peak value immediately downstream of the cavity. The amplitude of the pressure fluctuations ahead of the rear face increases with the length-to-width ratio for transitional-and closed-type cavity flows, and the maximum of peak pressure fluctuations rises rapidly for the transitional cavity flows at higher length-to-width ratio.

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“…Rossiter's theoretical model gives the modal frequencies, based on the interaction between an assumed periodic shear layer vortex shedding, and the acoustic waves travelling along the bay. The semi-empirical formula available for the estimation of the tonal frequencies, as modified by Heller [3] is:…”

Section: Introductionmentioning

confidence: 99%

Processing and analysis methods for transonic cavity flow

Loupy

Barakos

2017

Physics of Fluids

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This paper focuses on the localisation of noise sources in transonic cavity flows. Beamforming is used to estimate the pressure fluctuations inside a resonant transonic cavity, showing the localisation of the main sources of noise using an acoustic array and also combining it with a mean flow-field. The influence of the microphone array position, density, and shape are investigated. The presented method models the noise propagation with simple assumptions that are easily applicable to wind tunnel testing, and may help localise the noise sources from complex geometries without intrusive methods.

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Flow-induced pressure oscillations in shallow cavities

Cited by 350 publications

References 4 publications

Modelling of Transonic Shallow Cavity Flows

Modelling of Transonic Shallow Cavity Flows

Geometric Effect on Compressible Rectangular Cavity Flows.

Processing and analysis methods for transonic cavity flow

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