Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Life Firing Test of 1 N-class Monopropellant Thruster Development Model -Part I: Environmental Test and Steady State Performance

1 N급 단일추진제 추력기 개발모델의 장기수명 연소시험 -Part I: 환경시험 및 연속모드 성능 특성

  • Won, Su-Hee (Satellite Thermal & Propulsion Team, Korea Aerospace Research Institute) ;
  • Kim, Su-Kyum (Satellite Thermal & Propulsion Team, Korea Aerospace Research Institute) ;
  • Jun, Hyoung-Yoll (Satellite Thermal & Propulsion Team, Korea Aerospace Research Institute) ;
  • Lee, Jun-Hui (Defense R&D Center, Hanwha Corporation) ;
  • Park, Su-Hyang (Defense R&D Center, Hanwha Corporation) ;
  • Lee, Jae-Won (Defense R&D Center, Hanwha Corporation)
  • Received : 2014.09.18
  • Accepted : 2014.11.17
  • Published : 2014.12.01
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Abstract

Acceptance level random vibration and life firing test for development model of 1 N-class monopropellant thruster have been performed. From the results of random vibration, the natural frequency of the dual thurst module composed of 1 N-class development model thrusters was higher than the part level requirement(>100 Hz) and the structural robustness was verified. Thrust decrease of steady sate was below 7% and thrust instability was within ${\pm}5%$ in the life firing test using over 20 kg propellant throughput. The computerized tomography for catalyst bed showed a less than 7% of catalyst loss and it revealed the design appropriateness of the current thruster development model.

1 N급 단일추진제 하이드라진 추력기 개발모델에 대한 인수수준 랜덤 진동시험과 장기수명 연소시험이 수행되었다. 랜덤 진동시험 결과로부터 1 N급 추력기 개발모델로 구성된 이중추력기모듈의 고유 진동수는 부품수준 요구조건(100 Hz)을 상회하였으며, 구조적으로 강건함을 확인하였다. 또한 20 kg 이상의 추진제가 사용된 장기수명 연소시험 결과 연속모드 추력 감소는 약 7% 이하, 추력 불안정 현상은 ${\pm}5%$ 이내로 나타났다. 컴퓨터단층촬영을 이용해 추력기 내부의 촉매를 촬영한 결과 촉매의 손실은 약 7% 이하로 추력기 개발모델의 설계가 적절함을 보여주었다.

Keywords

References

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  1. Life Firing Test of 1 N-class Monopropellant Thruster Development Model -Part II: Pulse Mode Performance vol.18, pp.6, 2014, https://doi.org/10.6108/KSPE.2014.18.6.068