Heat transfer during air flow in aluminum foams |
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Authors: | Simone Mancin Claudio Zilio Alberto Cavallini Luisa Rossetto |
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Affiliation: | 1. University ‘Niccolò Cusano’, Department of Engineering, Via Don Carlo Gnocchi 3, 00166 Rome, Italy;2. University ‘La Tuscia’, Department of Economy, Via S.M. in Gradi, n.4, 01100 Viterbo, Italy;3. University of Rome ‘Tor Vergata’, Department of Enterprise Engineering, Via del Politecnico 1, 00133 Rome, Italy |
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Abstract: | This paper presents experimental heat transfer coefficients measured during air flow heating in seven different aluminum open-cell foam samples with different number of pores per inch (PPI), porosity and foam core height under a wide range of air mass velocity. Three imposed heat fluxes are considered for each foam sample: 25.0, 32.5 and 40.0 kW m?2. The collected heat transfer data are analyzed to obtain the global heat transfer coefficient and the normalized mean wall temperature. A model from the open literature has been selected and compared with the experimental database. A new simple heat transfer model, based on the present data, for the global heat transfer coefficient and the foam-finned surface area efficiency estimations has then been developed and compared against the experimental measurements. |
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