Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Combustion Characteristics of the Gaseous-methane & Gaseous-oxygen Reactants under Highly Fuel-rich Conditions

연료과농 조건에서의 기체메탄-기체산소 반응물의 연소특성

  • Kang, Yun Hyeong (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Ahn, Hyun Jong (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Bae, Chang Han (Department of Mechanical Design Engineering, Pukyong National University) ;
  • Kim, Jeong Soo (Department of Mechanical Engineering, Pukyong National University)
  • Received : 2021.10.03
  • Accepted : 2021.12.13
  • Published : 2021.12.31
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Abstract

A hot-firing test was conducted using gaseous-methane and gaseous-oxygen under highly fuel-rich condition as a prior study for the development of a liquid propellant small rocket engine. To compare combustion characteristics for various equivalence ratios, the oxygen flow rate was set to 12 g/s and the methane flow rate was changed according to the equivalence ratio. As a result, it was observed that the steady-state characteristic velocity obtained during the hot-firing test steeply rose in the latter part of each test: the difference between the former and the latter steady value was enhanced overall in proportion to the equivalence ratio. Based on this, the equivalence ratio range depending on the variational characteristics of the characteristic velocity could be divided into three combustion regimes.

본 연구에서는 액체 추진제 소형로켓엔진의 개발을 위한 선행연구로 연료과농 조건의 기체메탄-기체산소 연소시험 결과를 제시한다. 다양한 당량비에 대한 연소특성을 비교하기 위해 산소 공급 유량을 12 g/s로 설정하고 메탄 공급 유량을 변화시켰다. 시험 결과, 연소시험 중 형성되는 정상상태 특성속도가 후반에서 급작스럽게 증가하는 현상이 관측되었으며, 그 변화량은 당량비에 비례하여 커지는 경향을 확인할 수 있었다. 이를 바탕으로 특성속도의 변이특성에 종속하는 당량비 구간을 총 3가지 연소 범주로 구분하였다.

Keywords

Acknowledgement

본 논문은 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업(NRF-2016R1D1A3B01012622)의 연구결과임.

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