초음속 이중동축 스월제트 유동특성에 관한 연구

Study of Supersonic, Dual, Coaxial, Swirl Jet

  • 김중배 (안동대학교 기계공학과 대학원) ;
  • 김희동 (안동대학교 기계공학부) ;
  • 이권희 (사가대학교 기계공학과 대학원) ;
  • 세토구치 (사가대학교 기계공학과)
  • 발행 : 2003.04.23

초록

The supersonic swirl jet is being extensively used in many diverse fields of industrial processes since those lead to more improved performance, compared with the conventional supersonic no swirl jet. In the present study, an experiment is carried out to investigate the effect of annular swirl jet on the supersonic dual coaxial jet. A convergent-divergent nozzle with a design Mach number of 1.5 is used for the supersonic primary jet, and the sonic nozzles with four tangential inlets are used to make the secondary swirl jet. The primary jet pressure ratio is varied in the range from 3.0 to 7.0 and the outer annular jet pressure ratio is from 1.0 to 4.0. The interactions between the annular swirl and the inner supersonic jet are quantified by the pitot impact and static pressure measurements and visualized by using the Schlieren optical method. The results show that annular swirl jet alters the shock structure and impact pressure distributions compared with no swirl jet.

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