Using a side-branched volume to tune the acoustic field in a looped-tube travelling-wave thermoacoustic engine with a RC load

Al-Kayiem, A. and Yu, Z. (2017) Using a side-branched volume to tune the acoustic field in a looped-tube travelling-wave thermoacoustic engine with a RC load. Energy Conversion and Management, 150, pp. 814-821. (doi:10.1016/j.enconman.2017.03.019)

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Abstract

Travelling-wave thermoacoustic engine utilises a compact acoustic network to obtain a right time-phasing between the acoustic velocity and pressure oscillations within the regenerator to force gas parcels to experience a Stirling-like thermodynamic cycle. As such, thermal energy can be converted to mechanical work (i.e., high-intensity pressure waves). It is therefore crucial to control the time-phasing carefully to improve the performance of thermoacoustic engines. Various ways have been proposed and demonstrated for adjusting time-phasing, including both passive and active methods. The aim of this study is to introduce a new passive phase tuning method (i.e., a side-branched acoustic volume) to tune the time-phasing within a looped-tube travelling wave thermoacoustic engine. The proposed concept has been investigated both numerically and experimentally in this research. An experimental rig was simulated and designed using DeltaEC software (Design Environment for Low-amplitude ThermoAcoustic Energy Conversion). It was then constructed according to the obtained theoretical model. The result of this study showed a qualitative agreement between experimental measurement and numerical simulations, demonstrating that the proposed technique can effectively adjust the phase angle between the acoustic velocity and pressure oscillations within the loop-tube thermoacoustic engines, and improve its performance.

Item Type:Articles
Keywords:Phase tuning, travelling-wave, thermoacoustic engine, RC load.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Al-kayiem, Ali Abbas Hameed and Yu, Professor Zhibin
Authors: Al-Kayiem, A., and Yu, Z.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Energy Conversion and Management
Publisher:Elsevier
ISSN:0196-8904
ISSN (Online):1879-2227
Published Online:24 March 2017
Copyright Holders:Copyright © 2017 Elsevier Ltd.
First Published:First published in Energy Conversion and Management 150: 814-821
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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