한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제47권7호
  • /
  • Pages.517-524
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  • 2019
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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저비용 발사체를 위한 다단연소 사이클 액체로켓 엔진 시스템 설계

System Design of Staged Combustion Cycle Liquid Rocket Engine for Low Cost Launch Vehicle

  • 투고 : 2019.05.28
  • 심사 : 2019.06.28
  • 발행 : 2019.07.01
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초록

진공추력 88톤급 다단연소 사이클 로켓엔진의 시스템 설계를 수행하였다. 엔진 구성품에 대한 성능 평가는 기존의 연구를 활용하였으며 수렴된 엔진 시스템 성능을 구할 수 있는 알고리즘을 제안하였다. 본 연구 방법은 RD-180에 대한 기존의 연구와 비교함으로써 검증하였다. 본 연구는 가격 경쟁력을 고려하면서 성능 개선을 달성하기 위하여 한국형발사체 75톤 엔진의 개발 이력을 최대한 승계하였다. 엔진의 제작 난이도, 비용 그리고 성능 개선을 고려하여 연소압력 12MPa을 적용하였고 결과로써 23.4s의 진공비추력 향상을 얻을 수 있었다.

A system design has been performed for a vacuum thrust 88 ton staged combustion cycle rocket engine. Previous research has been used to estimate the performance of the engine components. And the algorithm has been proposed to evaluate the converged engine system performance. The present methodolgy has been verified by comparing the published data for RD-180. The present work adopts the most of the previous KSLV-II engine heritage for both performance improvement and cost competitiveness. The combustion pressure has been decided as 12MPa considering manufacturing difficulty, cost and performance improvement, and as a result the vacuum specific impulse has increased by 23.4s.

키워드

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