한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
권호 표지

기상 환원제를 사용하는 선택적 환원촉매에서 유동혼합 개선에 관한 연구

A STUDY ON FLOW MIXING IMPROVEMENT OF SELECTIVE CATALYTIC REDUCTION USING GASEOUS REDUCTANT

  • 고상철 (인하대학교 대학원 기계공학과) ;
  • 이범호 (인하대학교 대학원 기계공학과) ;
  • 조승환 (인하대학교 대학원 기계공학과) ;
  • 이상헌 (인하대학교 대학원 기계공학과) ;
  • 홍성태 (인하대학교 대학원 기계공학과) ;
  • 이대엽 (인하대학교 기계공학과)
  • 투고 : 2009.12.30
  • 심사 : 2010.03.19
  • 발행 : 2010.03.31
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초록

Since emission regulations for vehicles have become more stringent, SCR technology has drawn a strong attention in order to reduce NOx emissions. Optimal design of a reductant injection nozzle and a multi-hole plate located between the cone and catalyst is critical in that the uniform distribution of reductant is necessary to maximize the NOx conversion efficiency and minimize the slip of reductant in SCR. In this work, an LPG fuel(C3H8 in vapor state) was used as a reductant for LPG vehicles. A Realizable k-$\varepsilon$ model is used for turbulence, and SCR body is defined as porous media with inertia and viscous resistances measured in this work. Effect of the number of nozzle holes on the flow mixing index was analyzed, which revealed that a four hole nozzle shows the best performance in terms of uniformity of flow. An installment of a multi-hole plate at the entrance of catalyst was evaluated with flow mixing index, uniformity of flow, and pressure drop. A multi-hole plate with gradual hole diameter change in three steps showed the best uniformity of flow within the conditions suggested in this work.

키워드

참고문헌

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