Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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An experimental study on the characteristics of transverse jet into a supersonic flow field

초음속 유동장에서의 충돌제트 특성에 대한 실험적 연구

  • 박종호 (충남대학교 기계공학과) ;
  • 김경련 (충남대학교 기계공학과 대학원) ;
  • 신필권 (충남대학교 기계공학과 대학원) ;
  • 박순종 (충남대학교 기계공학과 대학원) ;
  • 길경섭 (한국항공우주연구원)
  • Published : 2003.12.01
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Abstract

When a secondary gaseous flow is injected vertically into a supersonic flow through circular nozzle, a complicated structure of flow field is produced around the injection area. The interaction between the two streams produces a strong bow shock wane on the upstream side of the side-jet. The results show that bow shock wave and turbulent boundary layer interaction induces the boundary layer separation in front of the side-jet. This study is to analyze the structure of flow fields and distribution of surface pressure on the flat plate according to total pressure ratio using a supersonic cold-flow system and also to study the control force of affected side-jet. The nozzle of main flow was designed to have Mach 2.88 at the exit. The injector has a sonic nozzle with 4mm diameter at the exit of the side-jet. In experiments, The oil flow visualization using a silicone oil and ink was conducted in order to analyze the structure of flow fields around the side-jet. The flow fields are visualized using the schlieren method. In this study, a computational fluid dynamic solution is also compared with experimental results.

Keywords

References

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