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David Arthurs

Bio: David Arthurs is an academic researcher from McMaster University. The author has contributed to research in topics: Acoustic resonance & Jet (fluid). The author has an hindex of 8, co-authored 14 publications receiving 173 citations. Previous affiliations of David Arthurs include University of Ontario Institute of Technology.

Papers
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Journal ArticleDOI
TL;DR: In this article, aero-acoustic tone generation of a high-speed planar gas jet impinging normally on a flat, rigid surface has been examined, where the authors used phase-averaged particle image velocimetry measurements.

36 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the self-excited acoustic resonance of two side-by-side cylinders in a duct with cross-flow for a single spacing ratio of T / D = 2.5, where D is the diameter of the cylinders and T is the centre-to-centre distance between them.

34 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the aeroacoustic response of an annular duct with closed coaxial side-branches, and examined the effect of several passive countermeasures on the resonance intensity.

34 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the effect of varying the jet thickness on the pattern of jet oscillation and the frequency of resulting acoustic tone, and found that the jet oscillations are controlled by a fluid-dynamic mechanism for small impingement distances, where the hydrodynamic flow instability controlled the jets oscillation without any coupling with local acoustic resonances.

18 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigate the flow-sound interaction mechanism in a T-junction combining the flow from its two co-axial side-branches into the central branch.

14 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, a single mode model for the prediction of self-sustained aero-acoustic oscillations in resonant pipe networks with closed branches is presented, which consists of the evaluation of the amplitude of each acoustic mode of the system by means of a balance between the acoustic source power and the acoustic power losses.
Abstract: Flow induced pulsations in resonant pipe networks with closed branches are considered in this review paper. These pulsations, observed in many technical applications, have been identified as self-sustained aeroacoustic oscillations driven by the instability of the flow along the closed branches. The fundamental aspects of the flow induced pulsations are discussed, with particular attention to the description of the sound sources. A single mode model for the prediction of the self-sustained oscillations is presented, the "energy balance". This model consists of the evaluation of the amplitude of each acoustic mode of the system by means of a balance between the acoustic source power and the acoustic power losses. The main components of this prediction method are discussed; these are the evaluation of the acoustic behavior of a pipe network and the modeling of the sound sources and the acoustic losses. Several field and scale model examples of pipe systems displaying self-sustained oscillations are presented, in order to discuss the parameters influencing the aeroacoustic behavior of pipe networks. Finally some counter-measures for the prevention of self-sustained oscillations are reviewed and perspectives for future work are considered.

84 citations

Journal ArticleDOI
TL;DR: In this article, it was shown that several coexisting tones appear to be generated by aeroacoustic feedback loops establishing between the nozzle lip and the flat plate, which also lead to the presence of hydrodynamic-acoustic standing waves.
Abstract: The generation of tones in a supersonic planar jet impinging on a flat plate normally has been investigated by performing compressible large-eddy simulations using low-dissipation and low-dispersion finite differences. At the exit of a straight nozzle of height $h$ , the jet is ideally expanded, and has a Mach number of 1.28 and a Reynolds number of 50000. Four distances between the nozzle and the plate between 3.94h and 9.1h have been considered. Flow snapshots and mean velocity fields are first presented. The variations of turbulence intensities and of the convection velocity in the jet shear layers are then examined. The properties of the jet near fields are subsequently described, in particular by applying Fourier decomposition to the pressure fields. Several coexisting tones appear to be generated by aeroacoustic feedback loops establishing between the nozzle lip and the flat plate, which also lead to the presence of hydrodynamic–acoustic standing waves. The tone frequencies are consistent with those given by the aeroacoustic feedback model and with measurements for high-aspect-ratio rectangular jets. The jet oscillation modes at these frequencies are characterized, and found to agree with experimental data. Their symmetric or antisymmetric natures are shown to be well predicted by a wave analysis carried out using a vortex sheet model of the jet, providing the allowable frequency ranges for the upstream-propagating acoustic waves. Thus, it is possible, for an ideally expanded impinging planar jet to predict both the frequencies of the tones and the symmetric or antisymmetric nature of the corresponding oscillation modes by combining the aeroacoustic feedback model and the wave analysis.

62 citations

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TL;DR: In this paper, the authors compared the whistling behavior of a multiple side branch system with that of corrugated pipes and proposed a prediction model based on the vortex sound theory.

60 citations

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TL;DR: In this paper, a free-vibration experiment was conducted to examine flow-induced vibration (FIV) characteristics of two identical circular cylinders in side-by-side arrangements at spacing ratio T = T/D = 0.1-3.2, covering all possible flow regimes, where T is the gap spacing between the cylinders and D is the cylinder diameter.

56 citations