한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제27권1호
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  • Pages.27-36
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  • 2023
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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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소형로켓엔진에 적용된 스월 동축형 인젝터의 형상변수와 기체-액체 운동량 플럭스 비에 따른 분무특성

Spray Characteristics According to the Variation of Design Parameters and Gas-liquid Momentum-flux Ratio in a Swirl-coaxial Injector Applied to Small Rocket Engine

  • Hyun Jong Ahn (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Yun Hyeong Kang (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Jeong Soo Kim (School of Mechanical Engineering, Pukyong National University)
  • 투고 : 2023.01.04
  • 심사 : 2023.02.13
  • 발행 : 2023.02.28
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초록

소형로켓엔진에 적용되는 기체-액체 스월 동축형 인젝터의 분무성능을 파악하고자 형상변수와 추진제의 공급조건을 변화시켜 수류시험을 수행하였다. 인젝터의 형상변수인 스월 챔버의 직경 및 수축부의 각이 증가할수록 스월 강도가 증대되어 분무성능이 향상되었다. 또한, 기체-액체의 운동량 플럭스 비가 증가함에 따라 기체 유동이 액적 일부를 분무액막에서 이탈시켜, 분무시트의 중심부에서 gas-droplet mixture core가 형성되었다.

To understand the atomization performance in gas-liquid swirl-coaxial injector applied to a small rocket engine, a cold-flow test was performed by varying the design parameters and supply condition of propellants. As the swirl-chamber diameter and the angle of the convergent section, which are design parameters of injector increased, the spray performance of the injector improved by increasing the swirl strength. In addition, as the gas-liquid momentum-flux ratio increased, the gas flow separated some of the droplets from the liquid film, and a gas-droplet mixture core was formed in the center of the spray sheet.

키워드

과제정보

본 논문은 과학기술정보통신부의 재원으로 한국연구재단의 지원을 받아 수행된 미래우주교육센터(2022M1A3C2085070)의 연구결과임.

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