한국가스학회지 (Journal of the Korean Institute of Gas)

  • 제19권6호
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  • Pages.22-27
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  • 2015
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  • 1226-8402(pISSN)
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  • 2713-6922(eISSN)
한국가스학회 (The Korean Institute of GAS)
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고고도 무인기용 수소 엔진의 시동성 및 공회전 연소 특성

Start and Idle Combustion Characteristics of Hydrogen Engine for the HALE UAV

  • 김용래 (한국기계연구원 그린동력연구실) ;
  • 최영 (한국기계연구원 그린동력연구실) ;
  • 이장희 (한국기계연구원 그린동력연구실)
  • Kim, Yong-Rae (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Choi, Young (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Lee, Janghee (Dept. of Engine Research, Korea Institute of Machinery and Materials)
  • 투고 : 2015.12.04
  • 심사 : 2015.12.24
  • 발행 : 2015.12.31
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초록

최근 고고도 장기체공 무인기의 개발이 활발하게 진행되고 있는 가운데, 중량당 에너지 밀도가 높아서 왕복동 엔진의 연료로서 적합한 수소 연료를 적용하는 것이 경제성과 기술성 측면에서 유리한 것으로 검토되었다. 본 연구에서는 2.4리터급 왕복동 가솔린엔진을 수소엔진으로 개조하기 위하여 수소연료를 공급하기 위한 실험장치를 구축하고 수소연료 공급이 가능한 인젝터를 장착하였으며 범용 엔진제어기를 이용하여 엔진을 구동시킴으로써 시동 및 공회전 시의 연소 특성을 파악하였다. 안전하게 엔진 시동성을 확보하였고 공회전 상태를 유지할 수 있는 조건을 탐색하였다. 또한 공회전 상태에서 공연비와 점화 타이밍을 변경해보면서 연소 안정성을 비롯한 기본적인 연소 특성을 살펴봄으로써 향후 수소엔진을 활용한 무인기의 동력원을 개발하기 위한 기초를 마련하였다.

Hydrogen features highest energy density per mass and is expected to be desirable as a fuel of HALE(High altitude long endurance) UAV(Unmanned aerial vehicle). A reciprocating internal combustion engine is known to be a reliable and economic power source for this kind of UAV. Therefore, the combination of hydrogen and engine is worth of doing research. Test bench with 2.4L Spark-Ignited engine was prepared for the experiment in which start and combustion characteristics at idle condition were examined in this study. Stable hydrogen supply system and a universal ECU(Engine control unit) were also utilized for the test engine. Equivalence ratio and spark timings at idle operation were investigated and compared to the data of gasoline engine. The results will be a starting point for full-scale research of hydrogen engine for HALE UAV.

키워드

참고문헌

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피인용 문헌

  1. Development of Test Stand for Altitude Test of Reciprocating Engine vol.22, pp.3, 2018, https://doi.org/10.6108/KSPE.2018.22.3.119