Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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An Approach to the Optimization of Catalyst-bed L/D Configuration in 70 N-class Hydrazine Thruster

70 N급 하이드라진 추력기의 촉매대 형상(L/D) 최적화 연구

  • Jung, Hun (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Kim, Jong Hyun (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Kim, Jeong Soo (Department of Mechanical Engineering, Graduate School, Pukyong National University)
  • Received : 2013.10.05
  • Accepted : 2013.11.17
  • Published : 2013.12.01
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Abstract

A ground hot-firing test was conducted to take out the optimal design configurations for the catalyst bed of liquid-monopropellant hydrazine thruster which could be used for primary engine or attitude control thruster of space vehicles. Performance characteristics with the variation of thrust-chamber length are investigated in terms of thrust, specific impulse, chamber pressure, characteristic velocity, and hydrazine decomposition rate. Additionally, the correlations between propellant-supply pressure and performance parameters are given. As results, increase of catalyst-bed length leads to performance degradation in this test condition, and also decreases propellant consumption efficiency with the supply pressure variation.

우주비행체의 주 엔진 및 자세제어용 추력기로 적용 가능한 단일액체추진제 하이드라진 추력기의 촉매대 최적설계형상 도출을 위한 지상연소시험을 수행하였다. 추력, 비추력, 연소실 압력, 특성속도, 그리고 하이드라진 분해반응률 등을 추력실 길이변화에 따라 고찰하고, 추진제 공급압력과 성능변수가 갖는 상관관계를 제시한다. 성능평가결과, 시험조건 내에서의 촉매대 길이증가는 추력기의 성능저하를 야기하고, 공급압력 변이에 따른 추진제 소모 효율성 또한 떨어뜨리는 것이 확인되었다.

Keywords

References

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