Convective heat transport along a thermoacoustic couple in the transient regime |
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| Affiliation: | 1. Key Laboratory of Distributed Energy Systems of Guangdong Province, Department of Energy and Chemical Engineering, Dongguan University of Technology, Dongguan 523808, China;2. College of Civil Engineering, National Center for International Research Collaboration in Building Safety and Environment, Hunan University, Changsha, Hunan 410082, China;1. Arts et Métiers ParisTech, Lab. DynFluid, 151 Bd. de l’Hôpital, 75013 Paris, France;2. LIMSI, CNRS, Université Paris-Saclay, Bât. 508, Rue John Von Neumann, Campus Universitaire, F-91405 Orsay Cedex, France;3. Sorbonne Universités, UPMC Univ Paris 06, UFR d’Ingénierie, 4 Place Jussieu, 75252 Paris Cedex 05, France;4. Institut Pprime, CNRS - Université de Poitiers - ENSMA, ENSIP, 6 rue Marcel Doré, Bât. B17 - BP 633, 86022 Poitiers Cedex, France;1. School of Mechanical and Automotive Engineering, Zhejiang University of Science and Technology, Hangzhou City, Liuhe Road, Zhejiang Province 310023, China;2. Department of Mechanical Engineering, Jilin University, ChangChun City, Qianjin Road, 130021, China;1. Danish Centre for Particle Therapy, Aarhus University Hospital, Aarhus, Denmark;2. Department of Medical Physics, Aarhus University Hospital, Aarhus, Denmark;3. Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark;4. Interdisciplinary Nanoscience Center, Aarhus University, Aarhus, Denmark;5. The Institute of Cancer Research, London, UK;6. Technical University of Denmark, Lyngby, Denmark;7. Department of Clinical Oncology, Rigshospitalet, Copenhagen, Denmark;8. Department of Oncology, Herlev and Gentofte Hospital, Copenhagen, Denmark;1. Geo-Systems Centre (CVRM), Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal;2. Department of Geo-Engineering, Technical University of Catalonia (UPC), 08034 Barcelona, Spain;3. Royal Academy of Sciences of Spain, 28004 Madrid, Spain |
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| Abstract: | This work proposes a simple calculus procedure based on the linear thermoacoustic theory. The methodology applies on rate of change (time derivative) rather than on steady state temperature distributions so it constitutes a complementary to conventional analysis to perform test on the reliability and applicability of the linear theory. The procedure has been applied to experimental data collected by means of a simple prototype of thermoacoustic device. The apparatus, whose technical characteristics are described in detail along with the data acquisition procedure, has been able to highlight the general features of the thermoacoustic effect. Measurements concern the acoustically generated temperature gradients across a ThermoAcoustic Couple, a structure firstly introduced by Wheatley and coworkers in 1983. The obtained results indicate that heat transfer phenomena are more critical than non linear acoustic behavior in determining the overestimation that theoretical predictions make on experimental values. |
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