Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

Spray-atomization Characteristics of Biodiesel Fuel with Multiple Injection

다단분사를 적용한 바이오디젤 연료의 분무 미립화 특성

  • Received : 2009.06.11
  • Accepted : 2010.01.15
  • Published : 2010.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

This study deals with the investigation about the effect of the pilot and split injection strategies on the spray-atomization characteristics of biodiesel fuel derived from a soybean oil. Experimental results were compared with the calculation results obtained from the numerical analysis. Fuel properties of biodiesel according to the variation of the fuel temperature were inserted to the fuel library in the KIVA code. The amount of fuel injection is divided into equal mass for each split and main injection. In this work, the pilot injection strategy can be achieved by the amount of fuel injection shortly before the start of the main injection. A spray tip penetration, radial distance and spray area were measured for the analysis of macroscopic spray characteristics. In addition, the local and overall droplet size distribution were calculated by using KIVA-3V code to study the effect of split and pilot injection on the atomization performance under high ambient pressure. From these studies, the experimental results showed the multiple injection induced the decrease of the spray tip penetration due to the reduction and division of the spray momentum compared to single injection. In the atomization performance, the droplet size increased in the case of the multiple injection a little. Moreover, the SMD slightly increased as the fuel droplets goes through the axial direction. The spray behavior of numerical results were well predicted the experimental multiple spray characteristics of biodiesel fuel.

Keywords

References

  1. R. D. Reitz, "Controlling DI Diesel Engine Emissions Using Multiple Injections and EGR," Combustion Science and Technology, Vol.138, pp.257-278, 1998. https://doi.org/10.1080/00102209808952071
  2. A. K. Agarwal, "Biofuels(Alchols and Biodiesel) Applications as Fuels for Internal Combustion Engines," Prog. Energy Combustion Science, Vol.33, pp.233-271, 2007. https://doi.org/10.1016/j.pecs.2006.08.003
  3. A. K. Babu and G. Devaradjane, "Control of Diesel Engine Pollutants by Split Injection Method Using Multi-zone Model," SAE 2001-28-0007, 2001.
  4. S. W. Park, H. K. Suh and C. S. Lee, "Effect of a Split Injection on Spray Characteristics for a Common-rail Type Diesel Injection System," Int. J. Automotive Technology, Vol.6, No.4, pp.315-322, 2005.
  5. D. A. Nehmer and R. D. Reitz, "A Study of Pilot Injection in a DI Diesel Engine," SAE 940668, 1994.
  6. N. A. Henein, M. C. Lai, I. P. Singh, L. Zhong and J. Han, "Characteristics of a Common Rail Diesel Injection System under Pilot and Post Injection Modes," SAE 2002-01-0218, 2002.
  7. M. Y. Kim, S. H. Yoon and C. S. Lee, "Impact of Split Injection Strategy on the Exhaust Emissions and Soot Particulates from a Compression Ignition Engine Fueled with Neat Biodiesel," Energy&Fuels, Vol.22, No.2, pp.1260-1265, 2009.
  8. C. S. Lee, S. W. Park and S. I. Kwon, "An Experimental Study on the Atomization and Combustion Characteristics of Biodiesel-blended Fuels," Energy&Fuels, Vol.19, pp.2201-2208, 2005.
  9. Y. Zhang and A. L. Boehman, "Impact of Biodiesel on $NO_x$ Emissions in a Common Rail Direct Injection Diesel Engine," Energy&Fuels, Vol.21, pp.2003-2012, 2007.
  10. S. H. Yoon, S. G. An, M. Y. Kim, S. I. Kwon and C. S. Lee, "Combution Characteristics of Biodiesel Fuel in a DI Diesal Engine," Fall Conference Proceeding, KSAE, pp. 698-704, 2005.
  11. S. H. Park, S. H. Yoon, H. K. Suh and C. S. Lee, "Effect of the Temperature Variation on Properties of Biodiesel and Biodiesel-ethanol Blends Fuels," Oil&Gas Science and Technology, Vol.63, No.6, pp.737-745, 2008.
  12. C. K. Sarre, S. C. Kong and R. D. Reitz, "Modeling the Effects of Injector Nozzle Geometry on Diesel Sprays," SAE 1999-01-0912, 1999.
  13. T. F. Su, R. D. Patterson, R. D. Reitz and P. V. Farrell, "Experimental and Numerical Studies of High Pressure Multiple Injection Sprays," SAE 960861, 1996.
  14. S. H. Park, H. J. Kim, H. K. Suh and C. S. Lee, "A Study on the Fuel Injection and Atomization Characteristics of Soybean Oil Methyl Ester (SME)," International Journal of Heat and Fluid Flow, Vol.30, pp.108-116, 2009. https://doi.org/10.1016/j.ijheatfluidflow.2008.11.002
  15. H. K. Suh, S. H. Park and C. S. Lee, "Effect of Injector Energizing Duration on the Atomization Characteristics of Biodiesel Fuel," Journal of ILASS-Korea, Vol.12, No.2, pp.108-114, 2007.