한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제22권5호
  • /
  • Pages.73-83
  • /
  • 2014
  • /
  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지
DOI QR코드

DOI QR Code

디젤엔진 배출가스의 질소산화물 저감을 위한 Solid SCR용 가스분사 시스템의 전산유체해석 연구

CFD Analysis on Gas Injection System of Solid SCR for NOx Reduction of Exhaust Emissions in Diesel Engine

  • 이호열 (한남대학교 대학원 기계공학과) ;
  • 윤천석 (한남대학교 기계공학과) ;
  • 김홍석 (한국기계연구원 그린동력연구실)
  • Lee, Hoyeol (Department of Mechanical Engineering, Graduate School, Hannam University) ;
  • Yoon, Cheon Seog (Department of Mechanical Engineering, Hannam University) ;
  • Kim, Hongsuk (Engine Research Center, Korea Institute of Machinery and Materials)
  • 투고 : 2013.11.26
  • 심사 : 2014.02.12
  • 발행 : 2014.07.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

CFD(computational fluid dynamics) model is developed to simulate direct injection of ammonia gas phase from ammonia transporting materials into the SCR catalyst in the exhaust pipe of the engine with solid SCR. Configurations of one-hole and four-hole nozzle, circumferential type, porous tube type, and the effect of mixer configurations which commonly used in liquid injection of AdBlue are considered for complex geometries. Mal-distribution index related to concentration of ammonia gas, flow uniformity index related to velocity distribution, and pressure drop related to flow resistance are compared for different configurations of complex geometries at the front section of SCR catalyst. These results are used to design the injection system of ammonia gas phase for solid SCR of target vehicle.

키워드

참고문헌

  1. H. Geering, C. Onder, M. Elsenser and C. Schear, "Control of a Urea SCR Catalytic Converter System for a Mobile Heavy Duty Diesel Engine," SAE 2003-01-0776, 2003.
  2. J. Seo, K. Lee, J. Oh, Y. Choi, J. Lee and J. Park, "The Study on the Effects of Mixer Configurations on Fluid Mixing Characteristics in SCR Systems," Transactions of KSAE, Vol.16, No.6, pp.192-199, 2008.
  3. S. Jeong, S. Lee, W. Kim and C. Lee, "Simulator on the Optimum Shape and Location of Urea Injector for Urea-SCR System of Heavy-duty Diesel Engine to Prevent $NH_3$ Slip," SAE 2005-01-3886, 2005.
  4. M. Chen and S. Williams, "Modelling and Optimization of SCR-exhaust Aftertreatment Systems," SAE 2005-01-0969, 2005.
  5. X. Zhang and M. Romzek, "3-D Numerical Study of Mixing Characteristics of $NH_3$ in front of SCR," SAE 2006-01-3444, 2006.
  6. G. Fulks, G. B. Fisher, K. Rahmoeller, M. Wu and E. D'Herde, "A Review of Solid Materials as Alternative Ammonia Sources for Lean NOx Reduction with SCR," SAE 2009-01-0907, 2009.
  7. C. Gerhart, H. Krimmer, B. Hammer, B. Schulz, O. Krocher, D. Peitz, T. Sattelmayer, P. Toshev, G. Wchtmeister, A. Heubuch and E. Jacob, "Development of a 3rd Generation SCR $NH_3$-direct Dosing System for Highly Efficient DeNOx," SAE 2012-01-1078, 2012.
  8. ANSYS Inc., Fluent 14.0.
  9. H. Weltens, H. Bressler, F. Teres, H. Neumaier and D. Rammoser, "Optimization of Catalytic Converter Gas Flow Distribution by CFD Pre-dictions," SAE 930780, 1993.
  10. M. Berkman and A. Katari, "Transient CFD : How Valuable is It for Catalyst Design," SAE 2002-01-0064, 2002.
  11. X. Hou, W. Epling, S. Schmieg and W. Li, "Cu-Zeolite SCR Catalyst Thermal Deactivation Studied with FTIR Spatial Resolution," SAE 2011-01-1138, 2011.
  12. M. Chen, J. Aleixo, S. Williams and T. Leprince, "CFD Modelling of 3-way Catalytic Converters with Detailed Catalytic Surface Reaction Mechanism," SAE 2004-01-0148, 2004.
  13. H. Lee, C. Yoon and H. Kim, "A Study on Reaction Rate of Solid SCR for NOx Reduction of Exhaust Emissions in Diesel Engine," Transaction of KSAE, Vol.21, No.5, pp.183-194, 2013. https://doi.org/10.7467/KSAE.2013.21.6.183
  14. B. R. Rahachandran, A. M. Halpern and E. D. Glendening, "Kinetics and Mechanism of the Reversible Dissociation of Ammonium Carbamate: Involvement of Carbamic Acid," J. Phys. Chem. A, Vol.102, No.22, pp.3934-3941, 1998. https://doi.org/10.1021/jp980376n