Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Study on the Dynamic Characteristics of Open Type Swirl Injector with Varyng Swirl Chamber Geometry

오픈형 스월 인젝터의 스월 챔버 형상 변화에 따른 동특성 연구

  • Kim, Hyuntae (Seoul National University, Department of Mechanical and Aerospace Engineering) ;
  • Chung, Yunjae (Seoul National University, Department of Mechanical and Aerospace Engineering) ;
  • Jeong, Seokkyu (Seoul National University, Department of Mechanical and Aerospace Engineering) ;
  • Yoon, Youngbin (Seoul National University, Department of Mechanical and Aerospace Engineering)
  • Received : 2014.07.22
  • Accepted : 2015.06.22
  • Published : 2015.07.01
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Abstract

Swirl injectors are widely used for Liquid Rocket Engine(LRE) as fuel injection system and following researches are also being carried out throughout the world. Especially, solving combustion instability problem is essential for every type of LREs. In this study, cold test was carried out for open type swirl injector as a fundamental research to solve combustion instability problem. Pressure fluctuation was applied to the inlet flow coming into the injector and the following response characteristics were observed. The effect of swirl chamber geometry was also studied by changing both swirl chamber length and diameter.

스월 인젝터는 액체로켓 엔진에서의 연료 분사 장치로 널리 사용되고 있으며, 이에 따른 연구 또한 활발하게 진행되고 있다. 특히 연소 불안정 문제를 해결하는 것은 모든 종류의 액체로켓 엔진에서 필수적이다. 본 연구에서는 연소불안정을 해결하기 위한 기초 연구로 오픈형 스월 인젝터에 대한 수류실험을 수행하였다. 인젝터로 유입되는 작동유체에 압력 섭동을 발생시키고, 그에 따른 응답특성을 실험적으로 파악하였다. 또한, 인젝터 스월 챔버의 길이와 지름을 변화시킴으로써 인젝터 구조의 변화에 따른 응답 특성의 변화를 확인하였다.

Keywords

References

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