한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제24권4호
  • /
  • Pages.1-11
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  • 2020
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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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단일연소관 이중추력 로켓모터의 내탄도성능 분석법 연구

Study on Internal Ballistic Performance Analysis for Single-chamber Dual-thrust Rocket Motors

  • Kwon, Hyeokmin (The 4th R&D Institute - 1st Directorate, Agency for Defense Development)
  • 투고 : 2020.05.02
  • 심사 : 2020.06.28
  • 발행 : 2020.08.31
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초록

본 연구에서는 추진제 연소면적을 조절하여 이중추력 프로파일을 구현하는 단일연소관 이중추력 로켓모터의 내탄도성능 분석 방법을 제시한다. 천이 구간에서의 연소속도 보정계수 및 비추력의 점진적 변화를 고려하며 성능 예측에 필요한 변수를 획득할 수 있는 분석법을 제시하고, 해당 분석법을 적용한 결과와 천이 구간 내 변화를 고려하지 않는, 기존 연구의 분석법을 적용한 결과를 비교함으로써 새로 제시하는 분석법에서 개선된 부분을 확인한다. 추진제 초기 온도 또는 배치 조건이 다른 네 가지의 시험 조건에 대하여 제시하는 분석법을 이용해 내탄도 변수를 획득하고, 이를 이용하여 각 시험 조건별로 성능 예측을 수행한다. 해당 예측 결과는 실제 연소시험 결과와 잘 일치하며, 따라서 본 연구의 분석법을 기반으로 설계 형상이 동일한 이중추력 모터의 성능 예측이 가능함을 확인할 수 있다.

In this study, study on the internal ballistic analysis method for single-chamber dual-thrust rocket motors meeting a dual-thrust profile requirement by tailoring the grain burning area is presented. The analysis method, which can acquire variables required for the performance prediction, considering gradual change of burning rate correction factor and specific impulse in the transition phase, is proposed. Improvements compared to the analysis method in the previous study, which do not consider change in the transition phase, are verified through comparison between the newly proposed method and the method in the previous study. Internal ballistic variables are obtained for four different ground firing test conditions using the proposed method, and the performance prediction for each condition is conducted using these variables. These prediction results and the ground test data are in good agreement, so it is confirmed that the performance prediction of dual-thrust motors with same design geometries based on the proposed analysis method is available.

키워드

참고문헌

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