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Experimental study of local convective exchanges on a rotating finned cylinder with air crossflow

Abstract : This study concerns energetic optimization of rotating devices like turbomachinery, electrical devices, brake disk and also computer-disk drives. In order to optimize their design, convective heat transfer around a rotating cylinder with airflow has been studied. An experimental setup, based on infrared thermography, allows to measure spatio-temporal temperature variations of a fin during its cooling. The local and mean convective heat transfer on the fin is identified by solving an inverse problem. The tests carried out allow analyzing the relative influences of the rotational and airflow forced convection on the heat transfer from thé fin surface, for different configurations. Moreover, finned System efficiency is evaluated in order to determine the optimal fin spacing according to rotation/airflow coupling. Finally, in order to understand the mechanisms which control convective heat transfer, flow fields around a fin are analyzed from particle imagery velocimetry (PIV) measurements.
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Submitted on : Tuesday, November 17, 2020 - 1:36:20 PM
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Benjamin Latour. Experimental study of local convective exchanges on a rotating finned cylinder with air crossflow. Sciences de l'ingénieur [physics]. Université de Valenciennes et du Hainaut-Cambresis, 2010. Français. ⟨NNT : 2010VALE0032⟩. ⟨tel-03009715⟩

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