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RISS 인기검색어
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- 저자 : 이기주(Keejoo Lee) (검색결과 116 건)
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이기주(Keejoo Lee),박재성(Jaesung Park),박순영(Soonyoung Park),최영인(Young In Choi),임석희(Seokhee Lim),박정호(Jeongho Park),고주용(Ju Yong Ko) 한국추진공학회 2019 한국추진공학회 학술대회논문집 Vol.2019 No.11
뉴스페이스 시대의 환경을 조사하고 소형위성 전용 발사체의 개발 사례를 분석함으로써 비용을 중심으로 하는 개발 전략과 선행연구의 시급성을 확인하였다. We investigated several development activities of emerging SmallSat launch vehicles in the Newspace age and confirmed the imminent needs of preceding research programs associated with low-cost development strategy.
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이기주(Keejoo Lee),임석희(Seok Hee Lim),고주용(Ju Yoeng Ko),박순영(Soon Young Park),박광근(Kwangkun Park),박재성(?Jaesung Park),안재명(Jaemyung Ahn) 한국추진공학회 2018 한국추진공학회 학술대회논문집 Vol.2018 No.12
전 세계 저궤도 발사시장의 10%를 점유하자는 우주 비전을 마련해서 소형위성 발사서비스를 육성해서 향후 10년간 200억원 이하 년 3회 발사를 목표로 총 30회 발사한다는 전략을 세우고 한국형발사체 개발사업에서 구축한 기존 인프라를 활용하여 소형위성 발사체를 민간 주도로 조속히 확보할 수 있으면 한국의 우주산업이 급격히 성장할 것으로 전망한다. 개념연구를 통해서 2단형 소형위성 발사체의 기술적인 타당성을 검토할 필요가 있다. A grand vision of taking up 10 percent of non-GSO satellite launch market in the next ten years could be realized if a long-term space strategy of promoting a small satellite launch service in cadence of three launches per year and a total of thirty launches at a price lower than 20M USD per launch were to be adopted on a firm foundation of the existing ground and vehicle infrastructure that had been developed for the KSLV-II program, and if a consortium of private enterprises were to invest in the development of small launch vehicles in prospect for a boom of the space industry in Korea. A conceptual study to examine the technical feasibility of TSTO small satellite launch vehicles is an appropriate next step.
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Falcon 9 방식의 한국형 재사용 발사체 및 정지궤도 발사체 임무설계
이금오(Keum-Oh Lee),서대반(Daeban Seo),임병직(Byoungjik Lim),이준성(Junseong Lee),박재성(Jaesung Park),최수진(Sujin Choi),이기주(Keejoo Lee) 한국추진공학회 2022 한국추진공학회지 Vol.26 No.3
The strategy to develop a launch vehicle family by bundling multiple rocket engines of a single type has been proven by SpaceX and their reusable fleet comprised of Falcon 9 and Falcon Heavy. In this study, we revisit a potential launch vehicle family out of a 35 tonf-class methalox staged combustion cycle engine and evaluate their utility and performance in various space missions. For example, a Korean version of Falcon 9 can deliver 4.7 tons of payload into 500 km SSO in an expendable mode while the payload is reduced to 2.16 tons in a sea-landing reusable mode. A Korean version of Falcon Heavy can deliver 4.4 tons into GTO when launched from the Naro Space Center, indicating that this common booster core configuration can handle Cheollian 2 albeit the high inclination. Once developed, the same methaloax engine can power the first-stage of smallsat launch vehicles and air launch vehicles.
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이금오(Keum-Oh Lee),임병직(Byoungjik Lim),이준성(Junseong Lee),이기주(Keejoo Lee),박재성(Jaesung Park) 한국추진공학회 2023 한국추진공학회지 Vol.27 No.3
In launch segment, 3D printed rocket engines have been a focal point of the new space activities. SpaceX was the first company to use 3D-printed parts for their rocket engines, Falcon 9’s Merlin and Dragon modules. Rocket Lab now routinely provides a dedicated launch service for smallsats due to efficient production of their Rutherford engine with an E-beam type printing method. Relativity Space well-known for their robotic manufacturing of propellant tanks is also about to fly their Aeon 1 engines built out of a PBF-type printing method. Virgin Orbit who recently proved their air launch system had also developed a 3D printed rocket engine. In Korea, KARI Small Launcher R&D Office built and tested thrust chambers for small rocket engines using metal 3D printing technology.
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