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ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684
Indexed in
THE EFFECT OF INITIAL AMBIENT TURBULENCE LEVELS ON ISO-OCTANE INJECTION SPRAYS
Краткое описание
Iso-octane, injected at high pressure into ambient nitrogen with different prescribed nearly isotropic turbulence levels, characterized by the root-mean-square (RMS) turbulence velocity, is explored experimentally. Mie scatter laser sheet and Schlieren techniques are combined with a high-speed camera to capture images of the vapor and liquid phases simultaneously as a function of injection pressure and ambient turbulence level. These indicate that the latter has a significant influence on tip penetration length, penetration width, cross-sectional area, and velocity. Increased initial ambient turbulence levels lead to reductions in the penetration length in the axial direction and increases in the penetration width in the radial direction; it is also shown to improve fuel evaporation and mixing.
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Aleiferis P. G., van Romunde Z. R., Larson G., Lawes M., Sheppard C. G. W., On the Effect of Ambient Turbulence and Thermodynamic Conditions on Fuel Spray Development for Direct-Injection Spark-Ignition Engines, Flow, Turbulence and Combustion, 95, 1, 2015. Crossref
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Elbadawy Ibrahim, Gaskell Philip H., Lawes Malcolm, Thompson Harvey M., Numerical investigation of the effect of ambient turbulence on pressure swirl spray characteristics, International Journal of Multiphase Flow, 77, 2015. Crossref
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Kale Rakesh, Banerjee R., Understanding spray and atomization characteristics of butanol isomers and isooctane under engine like hot injector body conditions, Fuel, 237, 2019. Crossref
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Verwey Cameron, Birouk Madjid, Experimental investigation of the evaporation of suspended mono-sized heptane droplets in turbulence intensities approaching unity, Combustion and Flame, 219, 2020. Crossref