プール沸騰に関する研究 : 第3報, 合体泡の離脱頻度の測定と半経験式の提案

抄録

Measurements were made of the departure frequency of coalesced bubbles from horizontal disks, of which diameter ranges from 2mm to 30mm. In a sintered metal disk nitrogen gas was fed steadily into the disk in liquid (water, ethanol or freon-113) and passes out as bubbles through the disk. The departure frequency of bubbles was also measured for the boiling of water, ethanol and freon-113 on thin horizontal wires of 0.2mm∼3mm in diameter. Bubble frequency was determined under atmospheric pressure by a video camera and a high speed camera. Semi-empirical correlations of frequency were proposed on the basis of the dimensional analysis of a momentum equation of bubbles and the results of measured departure frequency.