Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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A Study on Purge Gas Inflow according to Valve Operation Sequence during Staged Combustion Cycle Engine Reignition Test

다단연소 사이클 엔진 재점화 시험 시 밸브 작동순서에 따른 퍼지가스 유입에 대한 연구

  • Hwang, Changhwan (Engine Test and Evaluation Team, Korea Aerospace Research Institute) ;
  • Lee, Jungho (Engine Test and Evaluation Team, Korea Aerospace Research Institute) ;
  • Kim, Chaehyeong (Engine Test and Evaluation Team, Korea Aerospace Research Institute) ;
  • Jeon, Jun-Su (Engine Test and Evaluation Team, Korea Aerospace Research Institute) ;
  • Park, Jae-Young (Engine Test and Evaluation Team, Korea Aerospace Research Institute) ;
  • Lee, Kwang-Jin (Engine Test and Evaluation Team, Korea Aerospace Research Institute) ;
  • Cho, Nam-Kyung (Engine Test and Evaluation Team, Korea Aerospace Research Institute) ;
  • Kim, SeungHan (Engine Test and Evaluation Team, Korea Aerospace Research Institute) ;
  • Han, Yeoungmin (Engine Development Division, Korea Aerospace Research Institute)
  • Received : 2022.06.02
  • Accepted : 2022.08.08
  • Published : 2022.08.31
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Abstract

For the development of an improved upper-stage engine, research on a staged combustion cycle liquid rocket engine is in progress. A cold flow test, ignition test, and combustion test plans were established and performed to develop reignition combustion technology. In order to solve the problem of purge gas flowing into the fuel line, which may cause cavitation in the turbo pump during reignition, the test results of each stage were analyzed. Based on the analysis results, the purge gas inflow problem was solved by reducing the overlapping time between the operation of the bubble removal valve and the opening of the purge valve and the engine fuel valve. Based on this, the reignition combustion test was successfully performed.

개량된 성능의 상단엔진 개발을 위해 다단연소 사이클 액체로켓엔진의 연구가 진행 중이다. 재점화 기술을 개발하기 위한 수류시험, 점화시험, 연소시험을 계획하여 수행하였다. 재점화 시 터보펌프에서 캐비테이션 현상을 발생시킬 수 있는 연료라인으로의 퍼지가스 유입문제를 해결하기 위해, 각 단계의 시험결과를 분석하였다. 분석결과를 바탕으로 기포제거 밸브의 작동, 퍼지밸브와 엔진 연료밸브의 열림 중첩시간 줄임을 통해 퍼지가스 유입문제를 해결하였다. 이를 바탕으로 재점화 연소시험을 성공적으로 수행하였다.

Keywords

References

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