한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제16권3호
  • /
  • Pages.1-8
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  • 2012
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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분사압력 및 분사각에 따른 비충돌형 인젝터의 분무특성

Spray Characteristics of Nonimpinging-type Injector According to the Injection Pressure Variation and Angular Direction of Orifices

  • 정훈 (부경대학교 대학원 에너지시스템공학과) ;
  • 김종현 (부경대학교 대학원 에너지시스템공학과) ;
  • 김정수 (부경대학교 기계공학과)
  • 투고 : 2012.04.02
  • 심사 : 2012.05.23
  • 발행 : 2012.06.01
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초록

70 N급 액체로켓엔진에 장착되는 비충돌형 인젝터의 수류시험을 수행하였다. 추진제 분사각이 커짐에 따라 인젝터 분무의 분열 양상이 평활류(smooth jet)에서 파상류(wavy jet) 형태로 천이하고, 분무의 분열길이는 분사압력에 반비례한다. 고속카메라로 획득한 순간분무이미지(instantaneous spray image) 분석을 통하여 액주 표면에 나타나는 파상(ruffle)이 확인되었으며, 특정 분사압력 구간(0.93 MPa)에서 분무의 주기적 흘림현상이 증폭되는 이상현상이 발견되었다.

A water-flow test was carried out for the nonimpinging-type injector to be equipped on 70 N-class liquid-rocket engine under development. Breakup patterns of injector-spray transit from a smooth jet to wavy one as the injection angle increases, whereas spray-breakup lengths are inversely proportional to the injection pressure. It is confirmed that there exist ruffles on the surface of liquid column, which could be caught through the instantaneous spray images captured by high-speed camera. A phenomenon of spray shedding amplified at the specific pressure level of 0.93 MPa was an unexpected behavior of the injected stream and it is to be investigated further.

키워드

참고문헌

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