AM06-21-010 導電性薄膜を伝熱面とした乱流熱伝達の時空間分布測定(乱流熱物質移動(3),一般講演)

概要

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A technique for measurements of time-space characteristics of heat transfer to air has been developed using infrared thermography. A thin metallic-foil with a low heat capacity (a titanium foil of 2μm thick) was employed as a test surface, which was heated by applying a direct current. In this work, time-space distribution of heat transfer coefficient on the wall of a turbulent boundary layer was restored by solving the inverse problem in the heated surface, which consisted of the titanium foil, an air layer and a copper plate. It was possible to restore the heat transfer coefficient up to 0.04sec in time and 2.5mm in space, which revealed the unsteady behaviour of the heat transfer to air caused by streaks formed in the near-wall region.
日本流体力学会の論文
2006-09-05