Journal ArticleDOI
A theoretical study of non-linear damping by helmholtz resonators
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TLDR
A theoretical study of the interaction between finite-amplitude sound and a single Helmholtz resonator is presented in this paper, where flows in the entrance region, orifice and cavity have been considered in detail with the aid of the appropriate conservation equations.About:
This article is published in Journal of Sound and Vibration.The article was published on 1970-11-01. It has received 105 citations till now. The article focuses on the topics: Helmholtz resonator & Helmholtz free energy.read more
Citations
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The acoustic impendance of perforates at medium and high sound pressure levels
TL;DR: In this article, a study of the behavior of the acoustic impedance of a range of perforates at medium and high incident sound pressure levels was carried out, which included a detailed experimental programme together with a theoretical analysis of the problem.
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Sensitivity and Nonlinearity of Thermoacoustic Oscillations
Matthew P. Juniper,R. I. Sujith +1 more
TL;DR: In this article, a review explains why linear and nonlinear thermoacoustic behavior is so sensitive to parameters such as operating point, fuel composition, and injector geometry, and proposes tools to exploit this sensitivity in the future: adjoint-based sensitivity analysis to optimize passive control designs and complex systems theory to warn of impending thermo-acoustic oscillations and to identify the most sensitive elements of a thermo acoustic system.
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The absorption of sound by perforated linings
I. J. Hughes,Ann P. Dowling +1 more
TL;DR: In this article, the effect of the hot axial jet flow on the performance of a perforated lintern has been investigated. But the authors focused on a specific type of lintern, the "screech liner", which is a lintern with a bias flow through the perforations.
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A review of acoustic dampers applied to combustion chambers in aerospace industry
TL;DR: In this article, the authors summarize the status, challenges and progress of implementing acoustic dampers on engine systems and highlight potential, challenges, and issues associated with the dampers practical implementation.
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Calculation of perforated plate liner parameters from specified acoustic resistance and reactance
TL;DR: In this article, a mathematical procedure is developed for calculating the parameters of a single-layer perforated-plate acoustic liner in order to achieve a specified acoustic resistance and reactance for single-frequency excitation.
References
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Journal ArticleDOI
On the Theory and Design of Acoustic Resonators
TL;DR: In this paper, the effect of different aperture geometries on the resonance frequency of resonators is considered and illustrated by examples, considering losses due to viscosity, heat conduction, and radiation, the optimum design for maximum resonance absorption is analyzed, and the results are expressed in terms of design charts.
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Acoustic Nonlinearity of an Orifice
Uno Ingard,Hartmut Ising +1 more
TL;DR: In this article, the phase relationship between the fundamental harmonic components of pressure and velocity has been investigated by measuring simultaneously the oscillatory flow velocity in the orifice and the acoustic pressure fluctuations producing the flow.
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Acoustic Circulation Effects and the Nonlinear Impedance of Orifices
U. Ingård,S. Labate +1 more
TL;DR: In this paper, the authors used smoke particles in a 3.5-in. diameter circular tube to study acoustical streaming phenomena around orifices, showing that there exist four definite regions of flow as the particle velocity in the orif.
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Notes on the Exact Equations Governing the Propagation of Sound in Fluids
TL;DR: In this article, the authors present the theoretical assumptions underlying the exact equations of motion for a thermoviscous fluid and the complete equations are given, for reference convenience, in both tensor and vector form.
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Acoustic Impedance of a Helmholtz Resonator at Very High Amplitude
David Alan Bies,O. B. Wilson +1 more
TL;DR: In this paper, the acoustic impedance of a Helmholtz resonator terminating a ten-inch diameter tube has been investigated for sound pressure levels in the resonator of from 100 db to 170 db and for a range of particle velocities in the neck of the tube.