Effect of Injection Conditions on Penetration and Drop Size of HCCI Diesel Sprays

  • L. Araneo
  • A. Coghe
Conference paper


The more recent development in Diesel engines and the ongoing study of the HCCI concept will probably require, in a next generation of engines, early fuel injection in air at low pressure and density to reach a correct mixing and to match evaporation and ignition requirements. In this work different common rail nozzles, fed with fuel supplied at constant pressure in the range from 30 to 100 MPa, were used to produce sprays in air at ambient temperature and pressure ranging from 1 to 7 bar, to investigate the spray penetration as a function of air and fuel pressure. From the experimental results a scaling low was then deduced, which is able to account for different penetration curves in the various tests by a unique common behavior: a linear penetration part, whose length is function of the air density and of the nozzle diameter, followed by a decrease of the tip velocity. Best fit interpolation of the scaled results allowed the definition of a correlation that can predict the spray tip penetration in a wide range of conditions. For a reduced set of experimental conditions drop size and velocity were measured by phase Doppler anemometry; phase averaged mean diameter was then computed and analyzed as a function of the fuel injection pressure, and showed a clear reduction of the drop diameter with increasing injection pressure.


Diesel Engine Drop Size Nozzle Diameter Drop Size Distribution Diesel Spray 
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  1. Albrecht H E, Borys M, Damaschke N, Tropea C (2003) Laser Doppler and phase Doppler mesurement techniques, Springer-Verlag, Berl in Heidelberg.Google Scholar
  2. Araneo L, Tropea C (2000) Improving Phase Doppler measurements in a Diesel spray. SAL paper 2000–01–2047.Google Scholar
  3. Araneo L, Coghe A, Cossali GE (1998) Characteristics of a Diesel Spray Head by Different Laser Based Techniques, 9th International Symposium on Application of Laser Based Techniques to fluid Mechanics, July 1998, Lisbon, Portugal.Google Scholar
  4. Araneo L, Coghe A, Cossali GE, Brunello G (1999) Experimental investigation of gas density effect on diesel spray penetration and entrainment, SAE paper 1999–01–0525.Google Scholar
  5. Araneo L, Coghe A, Brunello G, Dondè R (2000) Effect of fuel Temperature and Ambient Pressure on a GDI Swirled Injector Spray, SAE paper 2000–01–1901.Google Scholar
  6. Di Stasio S, Valentino G, Corcione F E, Experiments on Applicability of Different Laser Diagnostics (2001) in Whitelaw J, Payri F, Desantes JM, (eds) Thermo-and Fluid-Dynamics Processes in Diesel Engines; Springer-Verlag, Berl in Heidelberg.Google Scholar
  7. Duret P (ed) (2001) A New generation of Engine Combustion Processes for the Future? Editions Technique, Paris.Google Scholar
  8. Gerla A, Brunello G, Cossali GE, Coghe A (1996) Effect of Gas Density and Temperature on Air Entrainment in a Transient Diesel Spray, SAE paper 960862.Google Scholar
  9. Hiroyasu H, Arai M, (1980) Fuel Spray Penetration and Spray Angle in Diesel Engines, Trans. of SAE of Japan, 21.Google Scholar
  10. Kuss D (2000), Verhaltensstudie der Strahlausbreitung eines Common-Rail-Injektor unter dem Einfluss von Einspritz- und Umgebungsdruk in einer Hochdruck-Einspritzkammer, Studienarbeit, Technische Universität Darmstadt Fachgebiet Strömungslehre und Aerodynamik.Google Scholar
  11. Lefebvre A H, (1989) Atomization and Sprays, Chapter 8, Hemisphere Publishing Corporation.Google Scholar
  12. Naher J D and Siebers D L (1996) Effects of gas Density and Vaporization on Penetration and Dispersion of Diesel Sprays, SAE paper n. 960034.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • L. Araneo
    • 1
  • A. Coghe
    • 1
  1. 1.Dipartimento di EnergeticaPolitecnico di MilanoMilanoItaly

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