Journal article

Flash vaporization of propane in an optically accessible, directly injected engine

J Lacey, H Aditiya, F Poursadegh, M Brear, R Gordon, C Lakey, B Butcher, S Ryan

International Journal of Engine Research | Sage Publications Ltd. | Published : 2021


This article presents an experimental and thermodynamic analysis of the direct injection of propane in an optically accessible variant of a downsized production engine. Propane is used as a surrogate for liquefied petroleum gas and is tested at several fuel rail conditions. Imaging of the sprays’ structure is conducted using planar laser Mie scattering. A number of seemingly counter-intuitive trends relating to rail pressure and temperature are observed from the experiments, and thermodynamic investigation is conducted to explain these trends. It is concluded that flash-boiling induced vaporization external to the injector nozzle is largely responsible for the observed behavior, and a new qu..

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