自励振動型ヒートパイプ内部の温度分布および圧力計測

抄録

The mechanism of Pulsating Heat Pipe (PHP) is still unclear because of its complex thermal fluid property. This study executes the visualization of temperature distribution and pressure measurement inside the PHP. Temperature Sensitive Paint (TSP) is painted on the optical window. The TSP is excited by UV LED light and the luminescence intensity is captured by CMOS camera. The fluid and wall temperature inside the PHP is measured instantaneously. When the flow was oscillating, the temperature and pressure at an arbitrary point inside the channel was fluctuated. On the other hand, when the flow was circulating, the temperature and pressure at the channel became stable apparently. Therefore, FFT analysis was performed on the circulating flow.