This content is not included in your SAE MOBILUS subscription, or you are not logged in.
The Influence of Fuel Volatility on the Liquid-Phase Fuel Penetration in a Heavy-Duty D.I. Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 23, 1998 by SAE International in United States
Annotation ability available
The objective of this investigation is to verify and characterize the influence of fuel volatility on maximum liquid-phase fuel penetration for a variety of actual Diesel fuels under realistic Diesel engine operating conditions. To do so, liquid-phase fuel penetration was measured for a total of eight Diesel fuels using laser elastic-scatter imaging. The experiments were carried out in an optically accessible Diesel engine of the “heavy-duty” size class at a representative medium speed (1200 rpm) operating condition. In addition to liquid-phase fuel penetration, ignition delay was assessed for each fuel based on pressure-derived apparent heat release rate and needle lift data.
For all fuels examined, it was observed that initially the liquid fuel penetrates almost linearly with increasing crank angle until reaching a maximum characteristic length. Beyond this characteristic length, the fuel is entirely vapor phase and not just smaller fuel droplets. The analysis also shows that there is a strong, essentially linear correlation between fuel mid-boiling point and maximum liquid-jet penetration. For example, for an increase in the fuel mid-boiling point from 220°C to 340°C, there was a corresponding increase in measured maximum liquid length from 21 to 35 mm for the operating condition investigated. However, no general correlation between mid-boiling point and measured ignition delay was evident, which indicates that chemical processes dominate physical ones with regard to autoignition. The data additionally indicate that in this type of Diesel engine (under typical warm-engine conditions), maximum liquid-fuel penetration occurs well before wall impingement, even for relatively high boiling point fuels.
CitationCanaan, R., Dec, J., Green, R., and Daly, D., "The Influence of Fuel Volatility on the Liquid-Phase Fuel Penetration in a Heavy-Duty D.I. Diesel Engine," SAE Technical Paper 980510, 1998, https://doi.org/10.4271/980510.
- Espey, C. Dec, J.E. “The Effect of TDC Temperature and Density on the Liquid-Phase Fuel Penetration in a D.I. Diesel Engine,” SAE Transactions 104 1400 1414 paper no. 952456 1995
- Dec, J.E. Espey, C. “Soot and Fuel Distributions in a D.I. Diesel Engine via 2-D Imaging,” SAE Transactions 101 1642 1651 paper no. 922307 1992
- Espey, C. Dec, J.E. Litzinger, T.A. Santavicca, D.A. “Quantitative 2-D Fuel Vapor Concentrations Imaging in a Firing D.I. Diesel Engine Using Planar Laser-Induced Rayleigh Scattering,” SAE Transactions 103 1145 1160 paper no. 940682 1994
- Espey, C. Dec, J.E. Litzinger, T.A. Santavicca, D.A. “Planar Laser Rayleigh Scattering for Quantitative Vapor-Fuel Imaging in a Diesel Jet,” Combustion and Flame 109 65 86 1997
- Kamimoto, T. Kobayashi, H. Matusoka, S. “A Big Size Rapid Compression Machine for Fundamental Studies of Diesel Combustion” SAE Transactions 90 3135 3143 paper no. 811004 1981
- Kamimoto, T. Yokota, H. Kobayashi, H. “Effect of High Pressure Injection on Soot Formation Processes in a Rapid Compression Machine to Simulate Diesel Flames,” SAE Transactions 96 4.783 4.791 paper no. 871610 1987
- Browne, K.R. Partridge, I.M. Greeves, G. “Fuel Property Effects on Fuel/Air Mixing in an Experimental Diesel Engine,” SAE paper 860223 1986
- zur Loye, A.O. Siebers, D.L. McKinley, T.L. Ng, H.K. Primus, R.J. “Cycle-Resolved LDV Measurements in a Motored Diesel Engine and Comparison with k-ε Model Predictions,” SAE Transactions 98 1142 1158 paper no. 890618 1989
- Bowditch, F.W. “A New Tool for Combustion Research - A Quartz Piston Engine,” SAE Transactions 69 17 23 1961
- Espey, C. Dec, J.E. “Diesel Engine Combustion Studies in a Newly Designed Optical-Access Engine Using High-Speed Visualization and 2-D Laser Imaging,” SAE Transactions 102 J. Fuels and Lubricants 703 723 paper no. 930971 1993
- Heywood, J.B. Internal Combustion Engine Fundamentals 509 511 McGraw-Hill 1988
- Dec, J.E. Espey, C. “Ignition and Early Soot Formation in a D.I. Diesel Engine Using Multiple 2-D Imaging Diagnostics,” SAE Transactions 104 853 875 paper 950456 1995
- Dec, J.E. “A Conceptual Model of D.I. Diesel Combustion Based on Laser-Sheet Imaging,” SAE paper 970873 1997
- Siebers, D.L. “Liquid-Phase Fuel Penetration in Diesel Sprays,” SAE paper 980809 1998
- “Calculated Cetane Index of Distillate Fuels,” American Society for Testing and Materials Philadelphia, PA