Browsing School of Engineering by Author "Bennett, Gareth"
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A graph-theory approach to optimisation of an acoustic absorber targeting a specific noise spectrum that approaches the causal optimum minimum depth
Bennett, Gareth (2021)Equivalent circuit analysis is a powerful tool for analysing acoustic systems where a lumped element model is valid. These equivalent circuits allow an overall impedance of the structure to be estimated which facilitates ... -
Grid fins shape design of a launch vehicle based on sequential approximation optimization
Bennett, Gareth (2018) -
Heat Transfer Enhancement In Ducts Due To Acoustic Excitation
Bennett, Gareth; Murray, Darina; Persoons, Tim (2009)The thermoacoustic effect that results from the interaction of a sound wave in a compressible fluid in contact with solid boundaries is known to be capable of removing heat from power dissipating systems. In this paper ... -
Implementation of a CDIO compliant syllabus in a large engineering programme
Bennett, Gareth; Kelly, Kevin; Lyons, Christopher (2008)The role of the engineer in industry has evolved, with to day’s engineering businesses seeking engineers with abilities and attributes in two broad areas - te chnical understanding and enabling skills. Institutions ... -
Implementation of Project Based Learning in a Large Engineering Programme
Boland, Francis; Pavia, Sara; Mc Goldrick, Ciaran; Kelly, Kevin; Bennett, Gareth; O'Kelly, Kevin (2010)The role of the engineer in industry has evolved, with today?s engineering businesses seeking engineers with abilities and attributes in two broad areas - technical understanding and enabling skills. Institutions within ... -
The Influence of Additive Manufacturing Processes on the Performance of a Periodic Acoustic Metamaterial
Bennett, Gareth; Kennedy, John (2019)Advancements in 3D print technology now allow the printing of structured acoustic absorbent materials at the appropriate microscopic scale and sample sizes. The repeatability of the fundamental cell unit of these metamaterials ... -
Landing Gear Noise Reduction by Double Jet Air Curtain Configuration
Bennett, Gareth (2015) -
A Method for Optimal Reconstruction of Velocity Response Using Experimental Displacement and Acceleration Signals
Bennett, Gareth (2007)An algorithm is developed which takes advantage of the positive characteristics of integration and differentiation operations which can produce an optimal time-domain estimate of a velocity signal when a displacement and ... -
Modelling multi-modal sound transmission from point sources in ducts with flow using a wave-based method
Bennett, Gareth (2009)An understanding of the multi-modal propagation of acoustic waves in ducts is of practical interest for use in the control of noise in, for example, aero-engines, automotive exhaust and ventilation systems. In this paper, ... -
Multi-chamber micro-perforated panel absorbers optimised for high amplitude broadband absorption using a two-point impedance method
Bennett, Gareth (2023)An optimised, multi-chamber, micro-perforated panel absorber (MC-MPPA) with micro-perforated adjoining panels is presented in this paper. An MPPA is a clean and efficient noise absorber with a simple structure making it ... -
Noise Characterization of a Full-Scale Nose Landing Gear
Bennett, Gareth; Kennedy, John (2018) -
Noise Source Identification For Ducted Fan Systems (AIAA 2007-3693)
Bennett, Gareth (2007)Understanding combustion noise source mechanisms, designing efficient acoustic liners and optimising active control algorithms for noise reduction requires the identification of the frequency and modal content of the ... -
Noise Source Location in Turbomachinery Using Coherence Based Modal Decomposition (AIAA 2009-3367)
Bennett, Gareth (2009)Coherence based source analysis techniques can be used to identify the contribution of turbomachinery core noise sources to pressure measurements in the far-field. The usual approach is to locate a measurement sensor ... -
Non-linear Identification Applied to Broadband Turbomachinery Noise
Bennett, Gareth (2008)Coherence based source analysis techniques can be used to identify the contribution of broadband noise sources in the exhaust of a gas turbine and hence enable the design of noise reduction devices. However, when the ... -
Nonlinear Frequency Scattering of Broadband Noise in Turbomachinery (AIAA 2010-3805)
Bennett, Gareth (2010)Coherence based source analysis techniques can be used to identify the contribution of broadband noise sources in the exhaust of a gas turbine and hence enable the design of noise reduction devices. However, when the ... -
Nonlinear vibro-acoustic behaviour in a circular membrane oscillator
Bennett, Gareth (2009)Oscillating systems that produce noise at a frequency of excitation may have as an abatement solution the increase of the frequency of excitation to above the audible frequency limit, viz. 20kHz. This approach may not ... -
Numerical Study of the Trajectory, Penetration, and Interaction of Single and Tandem Jets in a Crossflow Using LES
Bennett, Gareth (2024)In this paper, a large eddy simulation (LES) method was used to conduct a study on single and tandem jets in a crossflow, focusing particularly on their trajectory, penetration, and interaction. The numerical model was ... -
Open Design and the Reprap Project
Bennett, Gareth; O'Donnell, Garret (2010)This paper details the investigation of an emerging trend within technology development: `open design?. Improvements in communications and computing technology have made collaboration over geographically vast distances ... -
Prediction of the acoustic shielding by aircraft empennage for contra-rotating open rotors
Bennett, Gareth; Kennedy, John (2017) -
SeMSA: a compact super absorber optimised for broadband, low-frequency noise attenuation
Bennett, Gareth (2020)The attenuation of low-frequency broadband noise in a light, small form-factor is an intractable challenge. In this paper, a new technology is presented which employs the highly efficient visco-thermal loss mechanism of a ...