Aeroacoustic characterization and numerical simulation of a Helmholtz resonator

Gely, D.; Elias, G.; Lupoglazoff, Nicolas; Vincent, François; Micheli, F.

doi:10.2514/6.1999-1941

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The purpose of the double wall, on the other hand, is to reduce the transmission of sound by generating a high impedance mismatch. Second, the horn-shaped Helmholtz resonators exhibit the best absorption coefficients 50 at very large sound pressure levels (> 130 dB), owing to non-linear effects at the orifice [11]. The double wall with Helmholtz resonators investigated in this paper, on the other hand, are applicable in the linear regime.…”

mentioning

confidence: 90%

“…the cavity of a double wall with Helmholtz resonators) can be represented by a volume with equivalent fluid properties (effective bulk modulus and density) given by Eqs. (8) and(11), respectively. This representation depends only on the background545 fluid properties, the volumetric filling ratio φ R , Helmholtz resonance frequency f R , damping ratio ζ R , A c c e p t e d M a n u s c r i p t and, if applicable, the properties of the fluid inside the resonator.…”

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confidence: 99%

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Broadband low-frequency sound transmission loss improvement of double walls with Helmholtz resonators

Langfeldt

Hoppen

Gleine

2020

Journal of Sound and Vibration

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mentioning

confidence: 90%

mentioning

confidence: 99%

Broadband low-frequency sound transmission loss improvement of double walls with Helmholtz resonators

Langfeldt

Hoppen

Gleine

2020

Journal of Sound and Vibration

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An Investigation Into the Control of the Combustion Instability Using Acoustic Resonator for a Jet Engine

Jiang

Liu²,

et al. 2006

Dynamic Systems and Control, Parts a and B

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Combustion instability in jet engines impedes efficient burning of fuel and degrades engine performance. Moreover, it can cause damage to the combustion chamber and even lead to a destructive failure in the operation of the engine. Considerable work has been carried out both theoretically and experimentally to understand the characteristics of this instability and develop control methods. These instability studies have been found based upon different on-line tests. However, they have incurred high costs and have often achieved limited results. This paper presents an acoustic method that relies on the coupling relationship between combustion and acoustics to monitor the behaviour of the instabilities. The appropriateness of using this acoustic method is confirmed by off-line experimental results. In addition, it is possible to implement the test at very low cost. Based on this investigation, a scheme has been developed to control the instabilities. It consists of a bank of resonators designed to match the resonant frequencies at which instability occurs. Test results show that this scheme produces effective suppression of the instabilities.

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Numerical and Experimental Study of Resonant Liners Aeroacoustic Absorption Under Grazing Flow

Roche¹,

Vincent²,

Leylekian³

et al. 2010

16th AIAA/CEAS Aeroacoustics Conference

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Aeroacoustic characterization and numerical simulation of a Helmholtz resonator

Cited by 3 publications

References 4 publications

Broadband low-frequency sound transmission loss improvement of double walls with Helmholtz resonators

Broadband low-frequency sound transmission loss improvement of double walls with Helmholtz resonators

An Investigation Into the Control of the Combustion Instability Using Acoustic Resonator for a Jet Engine

Numerical and Experimental Study of Resonant Liners Aeroacoustic Absorption Under Grazing Flow

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