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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
Other TitleThermodynamic Effects on Cavitation Bubble Cluster in a Nozzle
Author(jpn)新井山, 一樹; 長谷川, 敏; 渡邉, 光男; 吉田, 義樹
Author(eng)Niiyama, Kazuki; Hasegawa, Satoshi; Watanabe, Mitsuo; Yoshida, Yoshiki
Author Affiliation(jpn)宇宙航空研究開発機構宇宙輸送ミッション本部宇宙輸送系推進技術研究開発センター; 宇宙航空研究開発機構宇宙輸送ミッション本部宇宙輸送系推進技術研究開発センター; 宇宙航空研究開発機構宇宙輸送ミッション本部宇宙輸送系推進技術研究開発センター; 宇宙航空研究開発機構宇宙輸送ミッション本部宇宙輸送系推進技術研究開発センター
Author Affiliation(eng)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)
Issue Date2011-02-28
PublisherJapan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構
Publication titleJAXA research and development memorandum
宇宙航空研究開発機構研究開発資料
VolumeJAXA-RM-10-018
Publication date2011-02-28
Languagejpn
eng
AbstractThermodynamic 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.
DescriptionOriginal contains color illustrations
形態: カラー図版あり
KeywordsCavitation; Thermodynamic effect; Cryogenic fluid; Nozzle flow; Flow visualization
Document TypeTechnical Report
JAXA Category研究開発資料
ISSN1349-1121
NCIDAA11983593
SHI-NOAA0064963000
Report NoJAXA-RM-10-018
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/21127


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