Simulation of flow and temperature development in a thermoacoustic resonator
The fluid flow pattern in a thermoacoustic resonator is an important characteristic that affects the performance of the thermoacoustic refrigerator. The main factor that affects the flow and subsequently the heat transfer processes between the oscillating fluid and the stack walls is the geometry of...
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Faculty of Engineering Universitas Indonesia
2015
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my.utm.559822016-11-15T06:41:00Z http://eprints.utm.my/id/eprint/55982/ Simulation of flow and temperature development in a thermoacoustic resonator Liew, Kimfa Mohd. Ghazali, Normah TJ Mechanical engineering and machinery The fluid flow pattern in a thermoacoustic resonator is an important characteristic that affects the performance of the thermoacoustic refrigerator. The main factor that affects the flow and subsequently the heat transfer processes between the oscillating fluid and the stack walls is the geometry of the stack unit, especially related to the stack thickness and stack separation. In this paper, a two-dimensional numerical simulation of the inviscid fluid flow around the stack unit in a quarter wavelength resonator is carried out by using the continuity, Navier-Stokes, energy and ideal gas equations. These equations are solved using the perturbation method and the finite difference method. Three cases of different stack plate thickness are investigated: negligible, 0.4 mm and 0.8 mm thicknesses, respectively. The stack separation has also been varied for the 0.4 mm thickness, within and beyond that recommended by previous studies. Results show that vortices and streaming are always present, more significantly with the thicker plates. Concentrated vortices in the thick plate case stay longer than those with the thinner plate. They contribute to the high heat transfer rate as shown by the temperature profiles. Faculty of Engineering Universitas Indonesia 2015 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/55982/1/KimfaLiew2015_SimulationofFlowandTemperatureDevelopmentinaThermoacoustic.pdf Liew, Kimfa and Mohd. Ghazali, Normah (2015) Simulation of flow and temperature development in a thermoacoustic resonator. International Journal of Technology, 6 (4). pp. 573-583. ISSN 2086-9614 http://dx.doi.org/10.14716/ijtech.v6i4.1022 DOI:10.14716/ijtech.v6i4.1022 |
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TJ Mechanical engineering and machinery Liew, Kimfa Mohd. Ghazali, Normah Simulation of flow and temperature development in a thermoacoustic resonator |
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The fluid flow pattern in a thermoacoustic resonator is an important characteristic that affects the performance of the thermoacoustic refrigerator. The main factor that affects the flow and subsequently the heat transfer processes between the oscillating fluid and the stack walls is the geometry of the stack unit, especially related to the stack thickness and stack separation. In this paper, a two-dimensional numerical simulation of the inviscid fluid flow around the stack unit in a quarter wavelength resonator is carried out by using the continuity, Navier-Stokes, energy and ideal gas equations. These equations are solved using the perturbation method and the finite difference method. Three cases of different stack plate thickness are investigated: negligible, 0.4 mm and 0.8 mm thicknesses, respectively. The stack separation has also been varied for the 0.4 mm thickness, within and beyond that recommended by previous studies. Results show that vortices and streaming are always present, more significantly with the thicker plates. Concentrated vortices in the thick plate case stay longer than those with the thinner plate. They contribute to the high heat transfer rate as shown by the temperature profiles. |
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Article |
author |
Liew, Kimfa Mohd. Ghazali, Normah |
author_facet |
Liew, Kimfa Mohd. Ghazali, Normah |
author_sort |
Liew, Kimfa |
title |
Simulation of flow and temperature development in a thermoacoustic resonator |
title_short |
Simulation of flow and temperature development in a thermoacoustic resonator |
title_full |
Simulation of flow and temperature development in a thermoacoustic resonator |
title_fullStr |
Simulation of flow and temperature development in a thermoacoustic resonator |
title_full_unstemmed |
Simulation of flow and temperature development in a thermoacoustic resonator |
title_sort |
simulation of flow and temperature development in a thermoacoustic resonator |
publisher |
Faculty of Engineering Universitas Indonesia |
publishDate |
2015 |
url |
http://eprints.utm.my/id/eprint/55982/1/KimfaLiew2015_SimulationofFlowandTemperatureDevelopmentinaThermoacoustic.pdf http://eprints.utm.my/id/eprint/55982/ http://dx.doi.org/10.14716/ijtech.v6i4.1022 |
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13.159267 |