Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference (한국초전도저온공학회:학술대회논문집)
- 2002.02a
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- Pages.27-30
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- 2002
Application of Superfluid Shock Tube Facility to experiment of High Reynolds number flow
초유동 충격파관 장치의 고레이놀즈수 유동실험에의 응용
- ;
- H. Nagai ;
- Y. Ueta (Institute of Engineering Mechanics and Systems, University of Tsukuba) ;
- K. Yanaka (Institute of Engineering Mechanics and Systems, University of Tsukuba) ;
- M. Murakami (Institute of Engineering Mechanics and Systems, University of Tsukuba)
- 양형석 (홍익대학교 부설 과학기술연구소) ;
- ;
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- Published : 2002.02.01
Abstract
The particle velocity in superfluid helium (He II) induced by a gas dynamic shock wave impingement onto He II free surface were studied experimentally by using Schlieren visualization method with an ultra-high speed video camera. It is found form visualization results that a dark zone in the immediate vicinity of the vapor-He II interface region is formed because of the high compressibility of He II and is developed toward bulk He II with the flowing-down speed of the vapor-He II interface. The mass velocity behind a transmitted compression shock wave that is equal to the contraction speed of He II amounts to 10 m/sec, the Reynolds number of which reaches
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