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, cilt.50, ss.50-65, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 50
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1504/ijvd.2009.024968
  • Dergi Adı: INTERNATIONAL JOURNAL OF VEHICLE DESIGN
  • Sayfa Sayıları: ss.50-65

Özet

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.