Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Experimental Study of Spray Characteristics on the Throttleable Dual Manifold Injector

이중 매니폴드 가변추력 분사기의 분무 특성에 관한 실험적 연구

  • 윤정수 (서울대학교 대학원 기계항공공학부) ;
  • 김성혁 (서울대학교 대학원 기계항공공학부) ;
  • 윤영빈 (서울대학교 항공우주신기술연구소)
  • Received : 2011.01.31
  • Accepted : 2011.04.18
  • Published : 2011.06.30
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Abstract

There is a many way of LPRE throttling methods, high-pressure-drop systems, dual-manifold injector, gas injection, multiple chambers, pulse modulation and movable injector components. Especially dual-manifold injector is essentially combines two fixed-area injectors into a common structure, with independent feed systems controlling flow to each injector manifold. In this paper, using indirect photography and liquid film thickness measurement with various injection pressure and tangential entry diameter to decide stability of spray over a wide thrust range in dual manifold injector.

추력변화를 위한 방법에는 여러 가지가 있는데, 고압력 강하 시스템, 이중 매니폴드 분사기, 가스 분사, 다중 챔버, 펄스 추력, 움직이는 분사기 구성요소 등이 있다. 이 중에서 이중 매니폴드 분사기의 경우에는 하나의 분사기 구조에 서로 다른 두 개의 매니폴드를 가지는 분사기를 결합하는 방식의 분사기인데, 각 분사기는 각각의 연료 공급시스템을 독립적으로 가지고 있어 각 매니폴드마다 독립적으로 유량을 조절 할 수 있다. 본 논문에서는 이중 매니폴드 분사기를 사용하여 넓은 추력범위에서 연료분사의 안정성을 판단하기 위하여 각 매니폴드의 접선방향 유입구 넓이의 비와 분사압력에 따라 분사 형상을 측정하고, 분사기 오리피스 끝단에서 액막 두께를 측정하였다.

Keywords

References

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