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title熱力学的効果が亜同期旋回キャビテ-ションに与える影響
Other TitleInfluence of thermodynamic effect on sub-synchronous rotating cavitation
Author(jpn)吉田, 義樹; 南里, 秀明; 菊田, 研吾; 風見, 佑介; 伊賀, 由佳; 井小萩, 利明
Author(eng)Yoshida, Yoshiki; Nanri, Hideaki; Kikuta, Kengo; Kazami, Yusuke; Iga, Yuka; Ikohagi, Toshiaki
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; 東北大学流体科学研究所; 東北大学流体科学研究所; 東北大学流体科学研究所
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); Institute of Fluid Science, Tohoku University; Institute of Fluid Science, Tohoku University; Institute of Fluid Science, Tohoku University
Issue Date2009-12-04
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-09-005
Publication date2009-12-04
Languagejpn
eng
AbstractTo investigate the influence of the thermodynamic effect on the sub-synchronous rotating cavitation, we conducted experiments in which liquid nitrogen was set at different temperatures (74 K, 78 K and 83 K ) with focusing on the fluctuation of the cavity length. Sub-synchronous rotating cavitation appeared at lower cavitation numbers in liquid nitrogen at 74 K, which was the same as that in cold water. In contrast, in liquid nitrogen at 83 K, the occurrence of sub-synchronous rotating cavitation was suppressed on the increase of thermodynamic effect due to the rising temperature. Furthermore, the unevenness of cavity length under the synchronous rotating cavitation was also decreased by the thermodynamic effect. However, surge mode oscillation occurred simultaneously under the condition of weakened synchronous rotating cavitation. Cavity lengths on the blades oscillated with the same phase maintained the uneven cavity pattern. It was estimated that the thermodynamic effect weakened the peripheral cavitation instability, i.e., synchronous rotating cavitation, but axial cavitation instability, i.e., surge mode oscillation, was induced easily because of the synchronization of the cavity fluctuation with an acoustic resonance in the present inlet-pipe system.
DescriptionOriginal contains color illustrations
形態: カラー図版あり
KeywordsSub-synchronous Rotataing Cavitation, Thermodynamic Effect, Surge Mode Oscillation, Acoustic Resonance
Document TypeTechnical Report
JAXA Category研究開発資料
ISSN1349-1121
NCIDAA11983593
SHI-NOAA0064455000
Report NoJAXA-RM-09-005
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/17000


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