Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA)
Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA)
Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA)
Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA)
出版者
宇宙航空研究開発機構
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構研究開発資料
雑誌名(英)
JAXA Research and Development Memorandum
巻
JAXA-RM-10-018
発行年
2011-02-28
抄録（英）
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.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
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
64963000.pdf
(1.88MB)
