Experimental and numerical investigation of diesel spray behaviour in high pressure common-rail systems


Soruşbay C. , Imren A., Ergeneman M., Valentino G., Allocca L.

INTERNATIONAL JOURNAL OF VEHICLE DESIGN, vol.50, pp.50-65, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50
  • Publication Date: 2009
  • Doi Number: 10.1504/ijvd.2009.024968
  • Title of Journal : INTERNATIONAL JOURNAL OF VEHICLE DESIGN
  • Page Numbers: pp.50-65

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 degrees sector grid. The mathematical model was verified with experimental results and a reasonable agreement was obtained.