마이크로 채널을 갖는 연소기에서의 유동분배 및 화염안정성 연구
Study on Flow Distribution and Flame Stability in Micro-channel Combustors
- 주제(키워드) Micro-scale combustion , Combustion stability , Combustion efficiency , Quenching distance , Excess enthalpy combustion
- 발행기관 서강대학교 일반대학원
- 지도교수 김대중
- 발행년도 2011
- 학위수여년월 2011. 8
- 학위명 석사
- 학과 및 전공 일반대학원 기계공학과
- 실제URI http://www.dcollection.net/handler/sogang/000000046909
- 본문언어 한국어
- 저작권 서강대학교의 논문은 저작권보호를 받습니다.
초록/요약
Understanding of micro-scale combustion mechanism is very essential to the development of combustion-based micro-power devices, which may supply much higher energy density than the batteries used nowadays. Accordingly, this thesis can be divided into three parts: (1) Computational Fluid Dynamics (CFD)-based numerical simulations have been performed to study the mixedness and combustion of non-premixed hydrogen?air gases in a chambers with same shape aspect ratio but various fuel injectors. And (2) a numerical simulation of combustion have been performed with combustion efficiency. (3) The transition of the combustion phenomena in the chambers from relatively large scale to micro-scale has been studied numerically to investigate the micro-combustion mechanism. In appendix of this paper, using a Swiss-roll combustor configuration, excess enthalpy combustion can be conveniently achieved. In this work, the combustors were tested using hydrogen/methane/air/oxygen mixtures of various equivalence ratios. Both temperature distributions and extinction limits were determined for each combustor configuration at different methane mass flow rates. Results indicate that the combustors developed in the current study greatly enhance combustion stability in center regions of the combustors
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