한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제20권3호
  • /
  • Pages.1-8
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  • 2016
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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다단연소사이클 엔진 파워팩 시동해석

Startup Analysis of Staged Combustion Cycle Engine Powerpack

  • Lee, Suji (Aerospace System Engineering, University of Science & Technology) ;
  • Moon, Insang (Rocket Engine Team, Korea Aerospace Research Institute)
  • 투고 : 2016.01.04
  • 심사 : 2016.03.25
  • 발행 : 2016.06.01
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초록

본 연구에서는 다단연소사이클 액체로켓엔진 파워팩에 대해 시동과정에서의 동특성 변화를 예측하였다. 시동특성과 관련된 주요 인자 중 밸브 개방시점에 대해 분산값을 정의하고 몬테카를로 방법을 적용하여 이들이 시동특성에 미치는 영향을 살펴보았다. 해석 결과, 연소기 연료 밸브 개방시간 및 시동터빈 종료시간이 시동특성과 관련된 주요 변수임을 확인하였다. 연소기 연료 밸브 개방시점과 시동터빈 종료시점을 분리하여 해석한 결과, 연소기 연료 밸브 개방시점이 시동특성과 매우 밀접한 관련이 있음을 확인하였고 안정적 시동을 위해서는 시동터빈 작동이후 약 1초 이전에 밸브가 개방되어야함을 알 수 있었다. 이를 통해 안정적 시동을 위한 시동 시퀀스 설정이 가능함을 확인하였다.

It was examined that start-up characteristics of a staged combustion cycle engine powerpack. Among various parameters, valve opening time was considered as a main factor affecting the start-up characteristics. Using monte-carlo method, characteristics variation was analyzed when the valve opening time deviates from the nominal value. As a result, the main fuel valve opening time and the start turbine ending time were significant associated with the startup characteristics. When separating main fuel valve opening time and start turbine stop time, main fuel valve opening time was an important factor. For stable operation, the main fuel valve opening time must be set one second before after driving the start turbine. Likewise, it was confirmed that the startup analysis can suggest an appropriate startup sequence for a stable startup.

키워드

참고문헌

  1. Kanumuri, A., Wakamatsu, Y., Shimura, T., Toki, K. and Torii, Y., "Start Transient Analysis of Turbopump-fed LOX/LH2 Rocket Engine (LE-5)," National Aerospace Laboratory of Japan, NAL-TR-868, 1985.
  2. Mahyar, N.T., Seyed, A.R.J.C. and Hassan, K., "Modeling and Simulation of Open Cycle Liquid Propellant Engines," Journal of Science and Engineering, Vol. 1, No. 1, pp. 17-37, 2013.
  3. Nam, C.H. and Park, S.Y., "A Study on Start-up of 75tonf Thrust Class Liquid Propellant Rocket Engine," 2013 KSME Spring Conference, Busan, Korea, pp. 206-208, May. 2013.
  4. Lee, S. and Moon, I., "Simulator Development for Startup Analysis of Staged Combustion Cycle Engine Powerpack," Journal of the Korean Society of Propulsion Engineers, Vol. 19, No. 5, pp. 62-70, 2015. https://doi.org/10.6108/KSPE.2015.19.5.062
  5. Lee, S. and Moon, I., "A Study on the Start Transient Analysis of the Staged Combustion Cycle Engine," 2014 KSPE Fall Conference, Gangwon-do, Korea, pp. 634-638, Dec. 2014.
  6. Jung, T. and Han, S., "Pipe Flow Model for a Liquid Rocket Engine Startup Analysis," 2015 SASE Spring Conference, Jeju, Korea, pp. 11-14, May. 2015.