Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Management of Test Facility for Tests of Liquid Rocket Engine on Off-Design Condition

액체로켓엔진 탈설계 조건 시험을 위한 시험설비 운용

  • Yu, Byungil (Engine Test and Evaluation Team, Korea Aerospace Research Institute) ;
  • Kim, Hongjip (Department of Mechanical Engineering, Chungnam National University) ;
  • Han, Yeongmin (Engine Test and Evaluation Team, Korea Aerospace Research Institute)
  • 유병일 (한국항공우주연구원 엔진시험평가팀) ;
  • 김홍집 (충남대학교 기계공학과) ;
  • 한영민 (한국항공우주연구원 엔진시험평가팀)
  • Received : 2020.05.17
  • Accepted : 2020.07.22
  • Published : 2020.10.31
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Abstract

A liquid rocket engine goes through many tests to prove its performance before liftoff. It means the tests for setting ignition and start-up conditions or a test on design condition, which verifies the design performance. However, the development process requires verification of performance under off-design conditions through tests involving different operating conditions, which affects the duration of engine development. The off-design performance test is performed by altering the conditions of the propellant supplied to the engine in conjunction with the engine performance test that varies the opening of the control valves in the engine. This paper is based on the results of the engine tests performed at the KSLV-II engine test facilities in the Naro Space Center and describes the operations of the test facility for off-design condition test that changes the inlet conditions of the turbo-pump due to changes in the pressure and temperature of the propellant supplied to the test engines.

액체로켓엔진은 발사 전까지 성능의 입증을 위해 많은 시험을 거친다. 점화 및 시동 조건 설정을 위한 시험이나 정격 조건에서의 성능시험을 통해 설계 성능을 검증한다. 하지만 개발과정에서 여러 작동조건의 시험을 통해 탈설계 조건에서의 성능확인이 필요하며 이는 엔진 개발기간에 영향을 준다. 엔진 내의 제어 밸브의 개도를 변화시키는 엔진 성능 시험과 함께 엔진으로 공급되는 추진제의 조건을 변경시켜 탈설계 성능 시험을 수행한다. 본 논문에서는 나로우주센터에 설치되어 있는 한국형발사체 액체로켓 엔진 시험설비에서 수행된 엔진 시험 운용 결과를 기초로 하고 있으며, 시험 대상체에 공급되는 추진제의 압력과 온도의 변화로 터보펌프의 입구 조건을 변경시키는 탈설계 조건 성능시험을 위한 시험설비 운용에 관한 내용을 기술하였다.

Keywords

References

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