Numerical study of flow and energy fields in thermoacoustic couples of non-zero thickness |
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| Authors: | L Zoontjens CQ Howard AC Zander BS Cazzolato |
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| Affiliation: | 1. Institute of Refrigeration and Cryogenics, Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027, China;2. National Institute of Standards and Technology, Boulder, CO 80305, USA;1. Institute of Mathematics, Silesian University of Technology, Gliwice, Poland;2. Institute of Power Engineering and Turbomachinery, Silesian University of Technology, Gliwice, Poland;3. Thermal Services, ALSTOM Ltd., Baden, Switzerland;1. Institute of Power Engineering and Turbomachinery, Silesian University of Technology, Gliwice, Poland;2. Institute of Mathematics, Silesian University of Technology, Gliwice, Poland |
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| Abstract: | A limitation in many previous numerical studies of thermoacoustic couples has been the use of stack plates which are of zero thickness. In this study, a system for modelling thermoacoustic couples of non-zero thickness is presented and implemented using a commercial CFD code. The effect of increased drive-ratio and plate thickness upon the time-average heat transfer through the stack material is investigated. Results indicate that the plate thickness strongly controls the generation of vortices outside the stack region, perturbing the flow structure and heat flux distribution at the extremities of the plate. An increase in plate thickness is also shown to improve the spatial integral of the total heat transfer rate but at the expense of increased entropy generation. |
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