Experimental and numerical investigation of diesel spray behaviour in high pressure common-rail systems Online publication date: Wed, 06-May-2009
by Cem Sorusbay, Abdurrahman Imren, Metin Ergeneman, Gerardo Valentino, Luigi Allocca
International Journal of Vehicle Design (IJVD), Vol. 50, No. 1/2/3/4, 2009
Abstract: The behaviour of a diesel spray, generated by a common-rail injection system, has been investigated. The experimental investigation was carried out by testing a high pressure injection system, for heavy duty direct injection marine diesel engines, to calibrate a reliable model for the simulation of liquid jet atomisation and droplet break-up of the fuel spray. The experimental facility comprised instantaneous measurements of the fuel injection rate and the characterisation of the spatial and temporal evolution of the diesel spray, injected in a high pressure, non-evaporative quiescent vessel. The fuel tip penetration was estimated by digital processing of spray images captured at different instants after the start of injection. The spray was modelled using KIVA-3v algorithm, with a Kelvin-Helmholtz, Rayleigh-Taylor spray break-up model on a 45° sector grid. The mathematical model was verified with experimental results and a reasonable agreement was obtained.
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