C131 赤外線サーモグラフィーによる非定常熱伝達測定 : 時定数および空間分解能の向上(C-13 乱流熱物質移動および反応流(1),一般講演)

概要

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A technique for the measurement of time-spatial characteristics of heat transfer to air has been developed using an infrared thermograph. The heated surface was fabricated from a thin metallic-foil having a low heat capacity in order to observe the fluctuating pattern of the temperature distribution. In this report, both the time-constant of the fluctuating temperature and the space-resolution of the temperature distribution were derived analytically. Also, the time-constant was estimated experimentally from the delayed signal of the temperature to a stepwise change of the heat input to the foil. In order to improve the time-constant together with the spatial-resolution, 2 micro-meter thick titanium foil was adopted as the heated surface, and introduced to the measurement of the unsteady heat transfer on the wall of a turbulent boundary layer. The fluctuating pattern of the heat transfer was observable, reflected by the streaks in the near-wall region.
日本流体力学会の論文
2004-08-09