한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제18권4호
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  • Pages.81-89
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  • 2014
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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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엔진베이 환기용 탠덤 이젝터의 1차원 해석모델링 기법 개발

1-D Analysis of Tandem-ejector for the Engine-bay Ventilation

  • Im, Ju Hyun (Advanced Propulsion Technology Center, Agency for Defense Development) ;
  • Kim, Myung Ho (Advanced Propulsion Technology Center, Agency for Defense Development) ;
  • Kim, Yeong Ryeon (Advanced Propulsion Technology Center, Agency for Defense Development) ;
  • Jun, Sang In (Aerospace Engineering Team, Korean Air)
  • 투고 : 2013.12.12
  • 심사 : 2014.07.11
  • 발행 : 2014.08.01
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초록

엔진베이의 환기를 위해 Tandem-ejector 개념을 도입하고, 성능 예측을 위해 1차원 모델링을 개발하였다. 모델링에서 주 노즐 제트유동과 주 제트유동에 의해 유도된 2차 유동 및 3차 유동 해석은 등엔 트로피 과정을 가정하고, 혼합 과정 해석은 질량, 운동량, 에너지 보존식에 기반한 검사체적해석 기법을 적용하였다. Tandem-ejector의 혼합유동이 대기로 방출되므로 방출되는 혼합유동의 정압력과 대기압력을 일치하도록 하고, 이러한 경계조건을 만족시키도록 주 노즐 제트유동의 압력손실 모델링을 구성하였다. Tandem-ejector의 1차원 해석을 통해 주 제트 유동의 압력변화에 따른 이젝터 성능 변화를 예측할 수 있었으며, 실 운용조건에서 주 제트유동의 공급압력 기준값 범위를 설정할 수 있었다.

Tandem-ejector has been devised for engine-bay cooling. In this study, 1-D model has been developed to analyze Tandem-ejector. In the model, the primary, the secondary and the tertiary flow conditions have been analyzed with isentropic process. The mixing process has been analyzed with conservation laws based on the control volume analysis. The total pressure loss of the primary flow has been analyzed under the matching condition between the static pressure of Tandem-ejector discharge flow and atmospheric pressure. Consequently, 1-D model can predict Tandem-ejector performance accurately and provide the performance map.

키워드

참고문헌

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