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Life Firing Test of 1 N-class Monopropellant Thruster Development Model -Part II: Pulse Mode Performance

1 N급 단일추진제 추력기 개발모델의 장기수명 연소시험 -Part II: 펄스모드 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

Abstract

During the life firing test of 1 N-class thruster development model, pulse mode performance and performance changes were examined. The deviation of pulse mode response time according to thruster feed pressure was relatively small and the resultant ignition delay, response time, tail-off time were 32-35 ms, 86-91 ms, 89-98 ms, respectively. For the stabilized pulse region the impulse bit revealed the outstanding reproducibility of 1.41, 1.32, 2.10% at $3{\sigma}$. During the life firing test, the impulse bit was decreased with limited amounts, therefore the pulse mode performance could be considered to be maintained. The thrust centroid was also maintained during the life firing test.

1 N급 단일추진제 추력기 개발모델의 장기수명 연소시험 동안 펄스모드 성능 특성 및 성능 추이를 살펴보았다. 응답 시간의 경우 주입압력조건에 따른 편차가 상대적으로 크지 않았으며, 점화지연, 반응시간, 하강시간이 각각 32-35 ms, 86-91 ms, 89-98 ms인 결과를 보여주었다. 안정화된 펄스 영역에서 주입압력조건에 따라 임펄스 비트는 $3{\sigma}$ 기준 1.41, 1.32, 2.10%의 뛰어난 재현성을 보여주었다. 장기수명 연소시험 동안 임펄스 비트가 다소 감소하지만 그 감소폭은 제한적이며, 따라서 펄스모드 성능이 유지되었다. 추력 중심 지연 또한 장기수명 연소시험 동안 일정한 것을 확인할 수 있었다.

Keywords

References

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