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The Effect of Mixing Rate and Multi Stage Injection on the Internal Flow Field and Combustion Characteristics of DISI Engine Using Methanol-gasoline Blended Fuel at High Speed / High Load Condition

고속 고부하 상태의 DISI 엔진에서 메탄올-가솔린 혼합연료의 연료 혼합비와 2단 분사가 엔진 내부유동 및 연소특성에 미치는 영향

  • Bae, Jinwoo (Department of Mechanical Engineering, Graduate School, Korea University) ;
  • Seo, Juhyeong (Department of Mechanical Engineering, Graduate School, Korea University) ;
  • Lee, Jae Seong (Department of Mechanical Engineering, Graduate School, Korea University) ;
  • Kim, Ho Young (Department of Mechanical Engineering, Korea University)
  • 배진우 (고려대학교 대학원 기계공학과) ;
  • 서주형 (고려대학교 대학원 기계공학과) ;
  • 이재성 (고려대학교 대학원 기계공학과) ;
  • 김호영 (고려대학교 기계공학부)
  • Received : 2011.12.13
  • Accepted : 2013.04.29
  • Published : 2013.09.01

Abstract

Numerical studies were conducted to investigate the internal flow field and combustion characteristics of DISI engine with methanol blended in gasoline. Dual injection was applied and the characteristics were compared to single injection strategy. The amount of the fuel injection was corresponded to air-fuel ratio of each fuel for complete combustion. The preforming model in this study, software STAR-CD was employed for both modeling and solving. The operating speed condition were at 4000 rpm/WOT (Wide open throttle) where the engine was fully warmed. The results of single injection with M28 showed that the uniformity, equivalence ratio, in-cylinder pressure and temperature increased comparing to gasoline (M0). When dual injection was applied, there was no significant change in uniformity and equivalence ratio but the in-cylinder pressure and temperature increased. When M28 fuel and single injection was applied, the CO (Carbon monoxide) and NO (Nitrogen oxides) emission inside the combustion chamber increased approximately 36%, 9% comparing with benchmarking case in cylinder prior to TWC (Three Way Catalytic converter). When dual stage injection was applied, both CO and NO emission amount increased.

Keywords

References

  1. J. H. Lee, H. Y. Kim and S. S. Yoon, "Numerical Studies on Flow and Combustion Characteristics with Various Injection Method of Gasoline Direct Injection Engine," KSAE Annual Conference Proceedings, pp.198-204, 2009.
  2. J. K. Hong, Methanol Opened De-oil Time, LG Weekly Economy Reference, pp.26-30, 2007.
  3. K. S. Shin, G. T. Bae and S. J. Yoo, "Shock Tube Study of Ignition of Methanol Oxygen Argon Mixture," Journal of the Korean Chemical Society, Vol.48, No.1, pp.99-102, 2004. https://doi.org/10.5012/jkcs.2004.48.1.099
  4. L. Bromberg and W. K. Cheng, Methanol as an Alternative Transportation Fuel in the US: Options for Sustainable and/or Energy-secure Transportation, Sloan Automotive Laboratory (MIT), pp.1-78, 2010.
  5. Y. G. Shin, S. S. Hwang and H. S. Lee, "A Feasibility Study for a Flexible Fuel Vehicle," IX International Symposium on Alcohol Fuels, 1991.
  6. C. L. Myung, S. H. Lee, Y. G. Shin, S. S. Park and H. S. Lee, "Research and Development of Hyundai FFVs(Flexible Fuel Vehicles)," KSAE 923872, pp.169-179, 1992.
  7. S. Liu, R. C. Eddy, T. Hu and Y. Wei, "Study of Spark Ignition Engine Fueled with Methanol/gasoline Fuel Blends," Applied Thermal Engineering, Vol.27, Issues 11-12, pp.1904-1910, 2007. https://doi.org/10.1016/j.applthermaleng.2006.12.024
  8. S. H. Park, H. J. Kim, H. K. Suh and C. S. Lee, "Atomization and Spray Characteristics of Bioethanol and Biomethanol Blended Gasoline Fuel Injected Through a Direct Injection Gasoline Injector," International Journal of Heat and Fluid Flow, Vol.30, Issue 6, pp.1183-1192, 2009. https://doi.org/10.1016/j.ijheatfluidflow.2009.07.002
  9. M. C. Yuen and L. W. Chen, "On Drag of Evaporating Liquid Droplets," Combustion Science and Technology, Vol.14, Issues 4-6, pp.147-154, 1976. https://doi.org/10.1080/00102207608547524
  10. V. Yakhot, S. Thangam, T. B. Gatski, S. A. Orszag and C. G. Speziale, "Development of Turbulence Models for Shear Flows by a Double Expansion Technique," Physics of Fluids, Vol.4, Issue 7, pp.1510-1520, 1992. https://doi.org/10.1063/1.858424
  11. R. I. Issa, "Solution of the Implicitly Discretised Fluid Flow Equations by Operator-splitting," Journal of Computational Physics, Vol.62, Issue 1, pp.40-65, 1986. https://doi.org/10.1016/0021-9991(86)90099-9
  12. P. Asproulis, High Resolution Numerical Predictions of Hypersonic Flows on Unstructured Meshes, Ph. D. Dissertation, University of London, UK, 1994.
  13. R. D. Reitz and R. Diwakar, "Effect of Drop Breakup on Fuel Sprays," SAE 860469, 1986.
  14. J. M. Duclos, M. Zolver and T. Baritaud, "3D Modelling of Combustion for DI-SI Engines," Oil & Gas Science and Technology, Vol.54, No.2, pp.259-264, 1999. https://doi.org/10.2516/ogst:1999023
  15. C. Bai and A. D. Gosman, "Modeling Heat Transfer to Impinging Fuel Sprays in Direct Injection Engines," Atomization and Sprays, Vol.5, Issue 2, pp.213-242, 1995. https://doi.org/10.1615/AtomizSpr.v5.i2.60
  16. S. W. Ryu and S. Y. Lee, "An Experimental Study on Post Impingement Behavior of an Electrically Charged Droplet," Ph. D. Dissertation, KAIST, Daejeon, Korea, 2008.
  17. J. H. Seo, H. Y. Kim, S. S. Yoon and J. H. Lee, "Analysis of Flow Characteristics and Combustion Characteristics Inside the Cylinder with Various Spray Cone Angle in Gasoline Direct Injection Engine," KSAE Spring Conference Proceedings, pp.25-30, 2010.