한국분무공학회지 (Journal of ILASS-Korea)

  • 제15권1호
  • /
  • Pages.31-37
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  • 2010
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  • 1226-2277(pISSN)
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  • 2288-9051(eISSN)
한국분무공학회 (Institute for Liquid Atomization and Spray Systems-Korea)
권호 표지

Dimethyl-ether (DME) 연료의 분무, 연소 및 배기 특성에 관한 실험 및 수치해석적 연구

A Study on the Spray, Combustion, and Exhaust Emission Characteristics of Dimethyl-ether (DME) by Experiment and Numerical Analysis

  • 박수한 (한양대학교 대학원 기계공학과) ;
  • 김형준 (한양대학교 대학원 기계공학과) ;
  • 이창식 (한양대학교 기계공학부)
  • 투고 : 2010.01.06
  • 심사 : 2010.03.03
  • 발행 : 2010.03.31
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초록

The aim of this work is to investigate the spray and combustion characteristics of dimethyl-ether (DME) at various injection conditions. The spray characteristics such as spray tip penetration and spray cone angle were experimentally studied from the spray images which obtained from the spray visualization system. Combustion and emissions characteristics were numerically investigated by using KIVA-3V code coupled with Chemkin chemistry solver. From these results, it revealed that DME spray had a shorter spray tip penetration and wider spray cone angle than that of diesel spray due to the low density, low surface tension, and fast evaporation characteristics. At the constant heating value condition, DME fuel showed higher peak combustion pressure and earlier ignition timing, because of high cetane number and superior evaporation characteristics. In addition, the combustion of DME exhausted more $NO_x$ emission and lower HC emission due to the active combustion reaction in the combustion chamber. The result shows that DME had a little soot emission due to its molecular structure characteristics with no direct connection between carbons.

키워드

참고문헌

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