壁面局所熱伝達係数の遠隔測定法

概要

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The present paper describes an experimental method to measure local heat flux from a distance. The method is based on the fact that when a wall is heated locally, the wall temperature rise depends on the local heat transfer coefficient at that point. In the experiment, the wall was heated by a power laser and the temperature rise was measured by an infrared spot thermometer. Transient heat conduction in a wall was numerically solved for a heated location. The integral of the temperature rise is found to be the quantity most sensitive to variation in heat transfer coefficient. If the integral value is measured within a 2% error margin, the heat transfer coefficient could be evaluated within a margin of 10% for acryl. For metals having high thermal diffusivity, however, error is above 80%. Automatical measurement with the aid of a personal computer made it possible to evaluate forced convection heat transfer coefficient of a flat plaster plate within an accuracy of 20%.
九州大学の論文
1988-06-30