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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Prediction on Throttling Performance of a Movable Sleeve Injector for Deep Throttling

딥 스로틀링 가변 슬리브 인젝터의 추력제어 성능예측

  • Park, Sunjung (Department of Aerospace Mechanical Engineering, Korea Aerospace University) ;
  • Nam, Jeongsoo (Department of Aerospace Mechanical Engineering, Korea Aerospace University) ;
  • Lee, Keonwoong (Department of Aerospace Mechanical Engineering, Korea Aerospace University) ;
  • Koo, Jaye (School of Aerospace Mechanical Engineering, Korea Aerospace University) ;
  • Hwang, Yongsok (Agency of Defense Development)
  • Received : 2017.12.06
  • Accepted : 2018.04.23
  • Published : 2018.06.01
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Abstract

Experimental analysis of the spray characteristics of the movable sleeve injector, which can simultaneously control the area of the annular gap and the pintle gap, has been studied and a method for controlling the uniform performance over a wide thrust range has been studied. It is confirmed that the design flow rate is not satisfied when the constant pressure difference is set regardless of the opening distance of the sleeve. In order to improve this, the differential pressure in the annular gap and the pintle gap was applied differently according to the opening distance. It was confirmed that the design flow rate was satisfied within the operating range and thrust control was linear from 25% to 100% in linear sleeve area.

환형 갭과 핀틀갭의 면적을 동시에 제어할 수 있는 가변 슬리브 인젝터의 분무특성을 실험적으로 분석하고, 넓은 추력범위에서 일정한 성능으로 제어할 수 있는 방안을 연구하였다. 슬리브의 개도에 관계없이 일정한 차압을 설정한 경우 설계유량을 만족하지 못하는 것을 확인하였다. 이를 개선하기 위해 개도에 따라 환형 갭과 핀틀 갭에서의 차압을 개도에 따라 다르게 적용하였다. 운용범위 내에서 설계 유량을 만족하였고, 선형적인 슬리브 면적으로 25%에서 100%까지 선형적으로 추력제어가 가능한 것을 확인하였다.

Keywords

References

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