Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Study on the Spray Characteristics of Liquid/Liquid Pintle Injector by Opening Distance

액체/액체 핀틀 분사기의 개도에 따른 분무특성 연구

  • Yoon, Wonjae (School of Mechanical Engineering, Chungbuk National University) ;
  • Ahn, Jonghyeon (School of Mechanical Engineering, Chungbuk National University) ;
  • Ahn, Kyubok (School of Mechanical Engineering, Chungbuk National University) ;
  • Yoon, Hosung (New Business Development Department, Spacesolutions Co., Ltd.)
  • Received : 2020.11.30
  • Accepted : 2021.05.15
  • Published : 2021.06.30
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Abstract

An experimental study was conducted on the spray characteristics of the pintle injector by opening distance. The discharge coefficient of the pintle injector was investigated and the spray angle was measured by taking the spray image by test conditions. As a result of the measurement of the discharge coefficient, it was confirmed that the change in the discharge coefficient of the outer injector was not significant over the experimental conditions, but the change in the discharge coefficient of the inner injector was decreased as the flow rate increased. Measurement of the spray angle showed that the change in the spray angle was not significant in the conditions under which the spray was fully developed, but the spray was not fully developed at low flow rates. This confirmed the possibility of thrust control using the pintle injector.

개도에 따른 핀틀 분사기의 분무특성에 대한 실험적 연구를 수행하였다. 분사조건에 따른 핀틀 분사기의 유량계수를 확인하였으며, 분무 이미지 촬영을 통해 분무각을 측정하였다. 유량계수 측정 결과 바깥쪽 분사기는 실험조건에 걸쳐 유량계수 변화가 크지 않았지만 안쪽 분사기는 유량에 따른 유량계수 변화가 큰 것을 확인하였다. 분무각 측정결과 분무가 완전 발달되는 조건에서는 분무각의 변화가 크지 않았으나 낮은 유량에서 분무가 완전 발달되지 않는 경우가 있었다. 이를 통해 핀틀 분사기의 추력조절 가능성을 확인하였다.

Keywords

Acknowledgement

본 논문은 과학기술정보통신부의 재원으로 한국연구재단(NRF -2019M1A3A1A02076962, NRF-2021M1A3B8077772) 및 한국항공우주연구원(KARI-FR21C00)의 지원을 받아서 수행되었으며, 이에 감사드립니다.

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