This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effects of Engine Speed on Spray Behaviors of the Engine Combustion Network “Spray G” Gasoline Injector
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
Annotation ability available
Non-reacting spray behaviors of the Engine Combustion Network “Spray G” gasoline fuel injector were investigated at flash and non-flash boiling conditions in an optically accessible single cylinder engine and a constant volume spray chamber. High-speed Mie-scattering imaging was used to determine transient liquid-phase spray penetration distances and observe general spray behaviors. The standardized “G2” and “G3” test conditions recommended by the Engine Combustion Network were matched in this work and the fuel was pure iso-octane. Results from the constant volume chamber represented the zero (stationary piston) engine speed condition and single cylinder engine speeds ranged from 300 to 2,000 RPM. As expected, the present results indicated the general spray behaviors differed significantly between the spray chamber and engine. The differences must be thoughtfully considered when applying spray chamber results to guide spray model development for engine applications. Overall, increases in engine speed correlated well with enhanced vaporization, loss of distinct plume structure, and enhanced spray collapse which led to reductions in wetted-footprint area. Furthermore, while loss of distinct plume structures appeared to be strongly dependent on ambient thermodynamic conditions, the relative impact of the spray collapse on wetted-footprint area was small. Of practical importance, while the spray chamber results indicated a consistent increase in wetted-footprint area through the end of injection, sprays in an engine underwent significant spray collapse and resulted in a parabolic area time history, with maximum values far less than the spray chamber values. These data will be made publicly available, in order to facilitate improved modeling efforts at realistic engine conditions as part of the objectives of the Engine Combustion Network.
- Luis Gutierrez - University of Michigan
- Andrew B. Mansfield - University of Michigan
- Mohammad Fatouraie - Robert Bosch LLC
- Dimitris Assanis - University of Michigan
- Ripudaman Singh - University of Michigan
- Joshua Lacey - University of Melbourne
- Michael Brear - University of Melbourne
- Margaret Wooldridge - University of Michigan
CitationGutierrez, L., Mansfield, A., Fatouraie, M., Assanis, D. et al., "Effects of Engine Speed on Spray Behaviors of the Engine Combustion Network “Spray G” Gasoline Injector," SAE Technical Paper 2018-01-0305, 2018, https://doi.org/10.4271/2018-01-0305.
- Engine Combustion Network, “ECN5 Proceedings,” https://ecn.sandia.gov/ecn-workshop/ecn5-workshop, accessed Oct. 2017.
- Engine Combustion Network, “Spray G Operating Condition,” https://ecn.sandia.gov/gasoline-spray-combustion/target-condition/spray-g-operating-condition/, accessed Oct 2017.
- Manin, J., Jung, Y., Skeen, S., Pickett, L. et al., “Experimental Characterization of DI Gasoline Injection Processes,” SAE Technical Paper 2015-01-1894, 2015, doi:doi.org/10.4271/2015-01-1894.
- Aleiferis, P.G., Serras-Pereira, J., van Romunde, Z.R., Caine, J. et al, “Mechanisms of Spray Formation and Combustion from a Multi-Hole Injector with E85 and Gasoline,” Combustion and Flame 157(4): 735-756, 2010, https://doi.org/10.1016/j.combustflame.2009.12.019
- Allocca, L., Catapano, F., Montanaro, A., Sementa, P. et al., “Study of E10 and E85 Effect on Air Fuel Mixing and Combustion Process in Optical Multicylinder GDI Engine and in a Spray Imaging Chamber,” SAE Technical Paper 2013-01-0249, 2013, doi:doi.org/10.4271/2013-01-0249.
- Bao, Y., Chan, Q., Kook, S., and Hawkes, E., “Spray Penetrations of Ethanol, Gasoline and Iso-Octane in an Optically Accessible Spark-Ignition Direct-Injection Engine,” SAE Int. J. Fuels Lubr. 7(3):1010-1026, 2014, doi:10.4271/2014-01-9079.
- Engine Combustion Network, “Spray G Parametric Variation,” https://ecn.sandia.gov/gasoline-spray-combustion/target-condition/spray-g-parametric-variation/, accessed Oct 2017.
- Zigler, B.T., Walton, S.M., Assanis, D., Perez, E. et al., “An Imaging Study of Compression Ignition Phenomena of Iso-Octane, Indolene, and Gasoline Fuels in a Single-Cylinder Research Engine,” Journal of Engineering for Gas Turbines and Power 130(5):052803, 2008.
- Fatouraie, M., Wooldridge, M., and Wooldridge, S., “In-Cylinder Particulate Matter and Spray Imaging of Ethanol/Gasoline Blends in a Direct Injection Spark Ignition Engine,” SAE Int. J. Fuels Lubr. 6(1):1-10, 2013, doi:doi.org/10.4271/2013-01-0259.
- Aleiferis, P.G. et al., “Optical Studies of Spray Development in a Quiescent Chamber and in a Direct-Injection Spark-Ignition Engine,” Presented at International Conference on Internal Combustion Engines: Performance, Fuel Economy and Emissions, London, 2007.
- Xu, M., Zhang, Y., Zeng, W., Zhang, G. et al., “Flash Boiling: Easy and Better Way to Generate Ideal Sprays than the High Injection Pressure,” SAE Int. J. Fuels Lubr. 6(1):137-148, 2013, doi:doi.org/10.4271/2013-01-1614.