自励振動型ヒートパイプ内の熱流動現象に関する研究 : 中性子ラジオグラフィによる冷媒挙動の可視化(熱工学,内燃機関,動力など)

概要

論文の詳細を見る
A self-vibration heat pipe having a meandering capillary tube can operate on top and horizontal heat mode without gravity effects. However, the behaviors of the working fluid in the pipe have not been well studied. In this study, the working fluid in the self-vibration heat pipe was visualized by neutron radiography system in Japan Atomic Energy Agency. The liquid columns formed in the cooling area were visualized at 200 frames/s in the meandering channel. Image processing methods to show the vibration of the liquid column were developed. It was shown that the liquid columns were vibrated around the cooling area and supplied to the heating area. The heat was transported from the heating area to the cooling area. The maximum effective thermal conductivity of the plates were about 20 times of aluminum. The flow pattern was evaluated at the volumetric ratio of liquid phase in the heat pipe. The periods of the vibration were predicted fairly well by a mass-spring model.
2010-06-25