한국초전도저온공학회:학술대회논문집 (Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference)

한국초전도저온학회 (The Korean Society of Superconductivity and Cryogenics)
권호 표지

초유동 충격파관 장치의 고레이놀즈수 유동실험에의 응용

Application of Superfluid Shock Tube Facility to experiment of High Reynolds number flow

  • 양형석 (홍익대학교 부설 과학기술연구소) ;
  • ;
  • ;
  • ;
  • ;
  • 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)
  • 발행 : 2002.02.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

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 $10^{7}$. This fact suggests that the superfluid shock tube facility can be applied to an experimental facility for high Reynols number flow as an alternative to the superfluid wind tunnel.

키워드