@techreport{oai:jaxa.repo.nii.ac.jp:00002556, author = {新井山, 一樹 and 長谷川, 敏 and 渡邉, 光男 and 吉田, 義樹 and Niiyama, Kazuki and Hasegawa, Satoshi and Watanabe, Mitsuo and Yoshida, Yoshiki}, month = {Feb}, note = {Thermodynamic effects on cavitation occurred in a nozzle flow were experimentally investigated with liquid nitrogen. The aspect visualization of cavitating flows shows that the quantity of cavity bubbles increased gradually with the decrease of cavitation number but the size of cavity bubbles did not so change then. And, the temperature measurement of cavitating flows shows that the temperature depression in the cavitating point increased with the decrease of cavitation number. It can be cleared that the temperature of the cavitating point decreases and decreases due to the evaporative latent heat of the increasing cavity bubbles. Furthermore, the size distribution obtained by image analysis on the visualized images shows that cavity bubbles did not grow up easily in the contracted section of the nozzle when the cavitation number is small. However, it also shows that the cavity bubbles did not shrink easily in the diverging section then. These features can be considered because the thermodynamic effects become strong due to the dramatic growth of bubbles at the beginning of cavitation., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA0064963000, レポート番号: JAXA-RM-10-018}, title = {ノズルに発生するキャビテーション気泡群に作用する熱力学的効果}, year = {2011} }