短線加熱法による極微細単線の半球全放射率測定

概要

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In this paper, a new short-hot-wire method for measuring total hemispherical emissivity of a fine fiber is proposed. This method is based on the theoretical solution of one dimensional steady heat conduction along the hot-wire and fiber. The hot-wire generates an uniform heat flux by supplying constant electric current, and both ends of wire are maintained initial temperature. Fiber is attached to the center area of two hot-wires. By using short-hot-wire technique, the fiber temperatures at the attached points and heat rates to the fiber from the hot-wires can be accurately obtained when the average temperature and heat rate of the hot wires are measured. Therefore, the emissivity of fiber can be easily estimated. According to the theoretical analysis, this method can obtain emissivity in the range of 0.1 to 1.0 within an error of ±1% for the fiber of 10μm in diameter.
九州大学の論文
1998-12-25