Towards enabling time-resolved measurements of turbulent convective heat transfer maps with IR thermography and a heated thin foil

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dc.contributor.author Raiola, Marco
dc.contributor.author Greco, Carlo Salvatore
dc.contributor.author Contino, Mattia
dc.contributor.author Discetti, Stefano
dc.contributor.author Ianiro, Andrea
dc.date.accessioned 2021-02-17T09:42:42Z
dc.date.available 2021-02-17T09:42:42Z
dc.date.issued 2017-05-01
dc.identifier.bibliographicCitation Raiola, M., Greco, C. S, Contino, M., Discetti, S. y Ianiro, A. (2017). Towards enabling time-resolved measurements of turbulent convective heat transfer maps with IR thermography and a heated thin foil. International Journal of Heat and Mass Transfer, 108, Part A, pp. 199-209.
dc.identifier.issn 0017-9310
dc.identifier.uri http://hdl.handle.net/10016/31945
dc.description.abstract The temperature of a heated foil, exposed to a turbulent flow, changes continuously in time due to the fluctuation of the convective heat transfer coefficient. Measuring with enough temporal resolution the foil temperature map and solving the unsteady energy balance of the foil can allow restoring the instantaneous value of the convective heat transfer coefficient. Nevertheless, the high characteristic frequencies of turbulent flows (especially in air) result in very small temperature fluctuations, which are typically hard to measure with an infrared camera. This work presents a novel filtering approach based on Proper Orthogonal Decomposition which allows to dramatically reduce the measurement random noise, thus enabling the detection of small temperature fluctuations and, as a consequence, to improve the estimate of instantaneous distributions of the convective heat transfer coefficient. The proposed methodology is tested on synthetic jets impinging on a foil, actuated with a loudspeaker at various actuation frequencies. The measurement capabilities of the present technique are assessed through comparison with measurements obtained from raw data and phase averaged measurements.
dc.description.sponsorship The authors wish to thank Mr. G. Sicardi for contributing the realization of the experimental setup. Marco Raiola, Carlo Salvatore Greco, Stefano Discetti, and Andrea Ianiro have been partially supported by grant DPI2016-79401-R of the Spanish Ministry of Economy and Competitiveness.
dc.format.extent 25
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2016 Elsevier Ltd. All rights reserved.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Unsteady flows
dc.subject.other Low order modelling
dc.subject.other Proper Orthogonal Decomposition
dc.subject.other Convective heat transfer
dc.subject.other Infrared thermography
dc.title Towards enabling time-resolved measurements of turbulent convective heat transfer maps with IR thermography and a heated thin foil
dc.type article
dc.subject.eciencia Aeronáutica
dc.identifier.doi https://doi.org/10.1016/j.ijheatmasstransfer.2016.12.002
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. DPI2016-79401-R
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 199
dc.identifier.publicationlastpage 209
dc.identifier.publicationtitle International Journal of Heat and Mass Transfer
dc.identifier.publicationvolume 108
dc.identifier.uxxi AR/0000019940
dc.contributor.funder Ministerio de Economía y Competitividad (España)
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