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NTIS 바로가기한국항공우주학회지 = Journal of the Korean Society for Aeronautical & Space Sciences, v.45 no.7, 2017년, pp.558 - 565
정기정 (Department of Mechanical and Aerospace Engineering, Seoul National University) , 배진현 (Department of Mechanical and Aerospace Engineering, Seoul National University) , 정석규 (Department of Mechanical and Aerospace Engineering, Seoul National University) , 손채훈 (School of Mechanical and Aerospace Engineering, Sejong University) , 윤영빈 (Department of Mechanical and Aerospace Engineering and the Institute of Advanced Aerospace Technology, Seoul National University)
Recently, there has been a tendency to lead the private sector in the launch vehicle market, and as the market has become saturated, efforts are being made to reduce the launch cost. Advanced countries in space development have promoted manned long-range space exploration plans. As oxygen/methane is...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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로켓 기술 개발이 안정화 되면서 어떤 경향을 보이는가? | 로켓 기술 개발 초기에는 구소련과 미국이 주도적이었나, 유럽, 중국에 이어 최근에는 인도와 일본, 이란, 북한, 우리나라에 이르기까지 로켓 기술을 보유하는 국가의 수가 늘어나고 있으며 기술 자체가 안정화 되어가고 있는 추세이다. 이에 따라 현재는 상업적으로는 과거 몇몇 국가가 독점했던 인공위성 발사체 시장이 다양화하여 포화되는 경향을 보이고있으며, 우주 탐사 분야에서는 냉전시대 이후로 한동안 조명 받지 못했던 달/화성 탐사가 다시재개되고 있다. | |
우주개발에서 현재 상업성을 높이기 위해 연구되고 있는 추진제의 특성은 무엇인가? | 과거 경쟁적 우주개발을 위한 목표에서 변경된 현재는 상업성을 높이기 위한 고효율과 저비용, 친환경성의 특성을 가지는 추진제가 요구되고 있다. 또한 최근에는 장거리·왕복 유인 우주 비행계획이 잇따라 추진되면서 행성 표면에서 추진제 합성이 가능한 추진제를 찾게 되었다. | |
우주개발 선진국에서 개발 중인 액체로켓엔진의 원료는? | 이러한 요구사항을 충분히 만족시키는 추진제 조합은 액체산소/액체메탄(또는 액화천연가스)이라 할 수 있다. 러시아와 미국을 비롯한 우주개발 선진국에서는 메탄을 연료로 사용하는 액체로켓엔진을 개발하고 있으며 최근 그 성과가 두드러지고 있다[6, 14, 18, 21, 24]. 국내에서도 메탄엔진 개발 시도가 있었으며 2006년에는 연소시험을 성공한 바 있다[38]. |
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