Japan Aerospace Exploration Agency Kakuda Space Center, Institute of Aerospace Technology
Japan Aerospace Exploration Agency
Japan Aerospace Exploration Agency Office of Space Flight and Operations
Japan Aerospace Exploration Agency Kakuda Space Center, Institute of Aerospace Technology
Japan Aerospace Exploration Agency Kakuda Space Center, Institute of Aerospace Technology
Institute of Fluid Science, Tohoku University
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報告
雑誌名(英)
JAXA Research and Development Report
巻
JAXA-RR-07-003
発行年
2007-09-28
抄録（英）
Synchronous rotating cavitation is one type of cavitation instability, causing synchronous shaft vibration or head loss. On the other hand, cavitation in cryogenic fluids has a thermodynamic effect on cavitating inducers because of thermal imbalance around the cavity. To investigate the influence of the thermodynamic effect on synchronous rotating cavitation, we conducted experiments in which liquid nitrogen was set at different temperatures (74 K, 78 K and 83 K). We clarified the thermodynamic effect on synchronous rotating cavitation in terms of cavity length, fluid force, and liquid temperature. Synchronous rotating cavitation occurs at the critical cavity length of L(sub c)/h = 0.8, and the onset cavitation number shifts to a lower level due to the suppression of cavity growth by the thermodynamic effect, the influence of which becomes more significant with rising liquid temperature. Furthermore, we confirmed that the fluid force acting on the inducer increases markedly under conditions of synchronous rotating cavitation.
熱力学的効果が同期旋回キャビテーションに与える影響
63533000.pdf
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