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

  • 제45권10호
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  • Pages.855-862
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  • 2017
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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 우주 발사체 개발 동향 및 이를 위한 차세대 연료에 대한 고찰

Development Trend of Low Cost Space Launch Vehicle and Consideration of Next Generation Fuel

  • Bae, Jinhyun (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Koo, Jaye (School of Mechanical and Aerospace Engineering, Korean Aerospace University) ;
  • Yoon, Youngbin (Department of Mechanical and Aerospace Engineering and the Institute of Advanced Aerospace Technology, Seoul National University)
  • 투고 : 2017.03.15
  • 심사 : 2017.09.04
  • 발행 : 2017.10.01
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초록

인공위성의 경량화 및 소형화로 인하여 대형발사체보다는 발사 비용이 저렴한 저비용 발사체에 대한 관심이 증가되고 있다. 저비용 발사체의 비용 절감 중 가장 대표적인 방식이 발사체의 재사용이다. 저비용 발사체를 개발하고 있는 대부분의 기업들 역시 발사체 재사용 방식을 채택하고 있다. 이러한 재사용 목적과 더불어 친환경 우주 발사체에 대한 요구가 증가되면서 저비용 발사체에 사용되는 연료의 선택 역시 매우 중요해졌다. 친환경적이면서 발사체의 재사용이 가능하게 하는 연료 중 에너지 밀도 등 다른 요인을 고려했을 때 가장 적합한 것이 메탄이며, 메탄에 수소를 첨가하여 에너지 밀도를 높게 만든 HCNG(hydrogen-enriched compressed natural gas) 역시 적합하다고 판단되었다. 본 연구는 한국형 발사체 개발 이후 국내 우주 개발 방향 설정의 참고자료로써 전 세계 저비용 발사체 동향 및 로켓 연료의 특성에 대해 고찰하였다.

Due to the weight reduction and miniaturization of satellites, there is a growing interest in low-cost launch vehicles, which are cheaper to launch than larger launch vehicles. One of the most cost-effective ways to reduce the cost of launch vehicles is the reuse of vehicles. Most companies that are developing low cost launch vehicles are also adopting a vehicles reuse approach. Along with this reuse purpose, the demand for environmentally friendly space launch vehicles has increased, so the choice of fuel used for low cost launch vehicles has also become very important. Methane and hydrogen-enriched compressed natural gas (HCNG), which makes more energy-efficient by adding hydrogen to methane, are considered to be the most suitable when considering other factors such as energy density among the fuels that are eco-friendly and capable of reusing the launch vehicles. This study investigated the trends of low-cost launch vehicle and rocket fuel in the world as a reference for setting up domestic space development after the development of Korea Space Launch Vehicle-II.

키워드

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