Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Performance Characteristics of GCH4-LOx Small Rocket Engine According to the Equivalence Ratio Variation at a Constant Pressure of Combustion Chamber

동일한 연소실 압력에서의 당량비 변화에 따른 기체메탄-액체산소 소형로켓엔진의 성능특성

  • Yun Hyeong Kang (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Hyun Jong Ahn (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Chang Han Bae (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Jeong Soo Kim (School of Mechanical Engineering, Pukyong National University)
  • Received : 2022.10.29
  • Accepted : 2022.12.13
  • Published : 2022.12.31
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Abstract

A correlation between propellant supply condition and chamber pressure in GCH4-LOx small rocket engine was explored and hot-firing tests were conducted to analyze the engine performance characteristics according to the equivalence ratio variation at a constant chamber pressure. Correlation studies have shown that chamber pressure is linearly proportional to oxidizer supply pressure. As a result of the test, the thrust, specific impulse and characteristic velocity that are the main performance parameters of a rocket engine, were found to be enhanced as the equivalence ratio starting from a fuel-lean condition approached the stoichiometric ratio, but the efficiencies of characteristic velocity and specific impulse were on the contrary, in their dependency on the equivalence ratio.

기체메탄-액체산소 소형로켓엔진에서 추진제 공급조건과 연소실 압력 사이의 상관관계를 조사하고, 고정된 연소실 압력에서 당량비 변화에 따른 성능특성을 분석하기 위해 지상연소시험이 수행되었다. 상관관계 조사를 통해 연소실 압력은 산화제 공급압력에 선형적으로 비례함이 확인되었다. 연소시험 결과, 당량비가 연료희박 조건으로부터 화학양론비에 가까워질수록 로켓엔진의 주요 성능인자인 추력, 비추력 및 특성속도는 증가하는 경향을 보였으나, 특성속도 효율 및 비추력 효율의 당량비에 대한 종속성은 그 반대의 경향을 보였다.

Keywords

Acknowledgement

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

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