Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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The Response Characteristics of the Hydrogen Peroxide Monopropellant Thruster as Injector and Catalyst Grain Size

인젝터 방식 및 촉매 알갱이 크기에 따른 과산화수소 단일추진제 추력기의 응답 특성

  • 안성용 (한국과학기술원 항공우주공학과) ;
  • 박대종 (한국과학기술원 항공우주공학과) ;
  • 정승미 (한국과학기술원 항공우주공학과) ;
  • 권세진 (한국과학기술원 항공우주공학과)
  • Published : 2009.02.28
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Abstract

The response characteristics of $H_2O_2$ monopropellant thrusters at a pulse mode were presented in this paper. A catalyst bed was fixed to $MnO_2$/$Al_2O_3$ to investigate the thruster design effect to response time. Three different thrusters (50 N class) having different injectors, ullage volumes, catalyst grain sizes, and reactor volumes were prepared to investigate the response characteristics. As a result, the ignition delay, pressure rising and tail-off time of case 2-2 thruster with 16-20 mesh catalyst size were 14, 108, 94 ms respectively, which were comparable to requirement of response time at commercial hydrazine thrusters.

과산화수소 단일추진제 추력기의 응답성에 대한 실험적 연구를 수행하였다. 촉매베드의 특성을 배제하고 추력기 설계 인자에 따른 응답특성을 살펴보기 위해 $MnO_2$/$Al_2O_3$를 주 촉매로 고정하였다. 세 가지 50 N 급 추력기를 이용하여 인젝터 방식, ullage volume, 촉매 펠렛 크기, 반응기 부피에 따른 응답 속도를 측정하였다. 측정 결과 16-20 mesh 크기 촉매, shower head 인젝터를 사용한 경우 점화지연, 압력 상승 및 하강시간은 각각 14, 108, 94 ms로 상용 하이드라진 추력기 응답성에 근접한 특성을 보였다.

Keywords

References

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