Investigation of flow features and acoustic radiation of a round cavity

Marsden, Olivier; Bailly, Christophe; Bogey, Christophe; Jondeau, Emmanuel

doi:10.1016/j.jsv.2012.03.017

Cited by 26 publications

(6 citation statements)

References 47 publications

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“…It is worth mentioning that although shallow cavities are known to potentially generate tonal noise, [26][27][28] this is not the case here. First, measurements have been done for different flow velocities without the orifice, and no sharp peak was observed.…”

Section: B Reflections At the Boundariesmentioning

confidence: 87%

Whistling of an orifice in a reverberating duct at low Mach number

Lacombe

Moussou

Aurégan

2011

The Journal of the Acoustical Society of America

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An experimental investigation of the parameters controlling the whistling frequency and amplitude of an orifice in a confined turbulent flow is undertaken. A circular single hole orifice with sharp edges, a hole diameter equal to 0.015 m and a thickness equal to 0.005 m, is arranged in an air test rig with an inner diameter equal to 0.03 m. The Mach number ranges around 0.02 and the Reynolds number around 10(4). Variable reflecting boundary conditions are arranged upstream and downstream, and several flow velocities are tested. It is found that the Bode-Nyquist criterion accurately predicts the conditions of self-sustained oscillation and the value of the whistling frequency. Furthermore, it is found that the acoustic velocity in whistling regime varies from 1% to 15% of the steady flow velocity, and that it depends on the overall acoustic reflection of the surrounding pipe and on the Strouhal number.

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Section: B Reflections At the Boundariesmentioning

confidence: 87%

Whistling of an orifice in a reverberating duct at low Mach number

Lacombe

Moussou

Aurégan

2011

The Journal of the Acoustical Society of America

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“…Another example is Marsden et al. (2012), who used the same approach in combination with particle image velocimetry (PIV) in the central plane of their cylindrical cavity.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Mast & Pierce (1995) and Kook & Mongeau (2002), who used a frequency-domain describing function analysis to predict the occurrence and the amplitude of deep cavity whistling. Another example is Marsden et al (2012), who used the same approach in combination with particle image velocimetry (PIV) in the central plane of their cylindrical cavity.…”

Section: Introductionmentioning

confidence: 99%

Whistling of deep cavities subject to turbulent grazing flow: intermittently unstable aeroacoustic feedback

2020

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“…Bennett et al [19] examined their excitation through a particle image velocimetry (PIV) study of the SL over the orifice, Verdugo et al [20] identified the noise source and sink in the SL using an experimental method employing Howe's analogy, and Stephens et al [21] studied the effect of orifice location and characteristics on the mode excited. In aeroacoustics, a study by Marsden et al [22] was performed examining cylindrical burst-disk cavities and vent holes located under wings, which they stated have been subject to little investigation, despite being clearly identifiable in flyover measurements. In this current paper, we are particularly interested in exploring test cases, in which both planewave longitudinal modes and also azimuthal modes are excited.…”

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confidence: 99%

Cavity Resonance Suppression Using Fluidic Spoilers

Bennett¹,

Okolo²,

Zhao³

et al. 2019

AIAA Journal

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This paper examines experimentally the use of a fluidic spoiler to suppress the resonance within a partially closed cylindrical cavity subject to a grazing flow. The relative movement of aircraft and high-speed land-based vehicles through air often results in structural cavities in these vehicles being subject to shear-layer-driven resonance. This can lead to high-amplitude pressure fluctuations within the cavity volume, causing damage to stores or equipment found within landing-gear wheel or weapon bays, for example, or else significant discomfort to the passengers of cars or trains. This large-scale buffeting can also cause vehicle stability problems and can increase drag. This work presents a novel method, in which passive flow control consisting of an upstream fluidic spoiler is used to redirect the upstream flow so that the cavity orifice is shielded. As a result, the grazing flow can no longer detach from the upstream leading edge of the cavity, and thus, vortex shedding is suppressed. The scope of the study includes an examination of higherorder azimuthal acoustic modes excited in the cylindrical cavity: modes which have received little attention in the literature, but which can be readily excited for many flow configurations for partially covered cavities.

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Investigation of flow features and acoustic radiation of a round cavity

Cited by 26 publications

References 47 publications

Whistling of an orifice in a reverberating duct at low Mach number

Whistling of an orifice in a reverberating duct at low Mach number

Whistling of deep cavities subject to turbulent grazing flow: intermittently unstable aeroacoustic feedback

Cavity Resonance Suppression Using Fluidic Spoilers

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