The influence of injector parameters on the formation and break-up of a diesel spray

R. Morgan, J. Wray, D.A. Kennaird, Cyril Crua, Morgan Heikal

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBNpeer-review


The influences of injector nozzle geometry, injection pressure and ambient air conditions on a diesel fuel spray were examined using back-lighting techniques. Both stills and high-speed imaging techniques were used. Operating conditions representative of a modern turbocharged aftercooled HSDI diesel engine were achieved in an optical rapid compression machine fitted with a common rail fuel injector. Qualitative differences in spray structure were observed between tests performed with short and long injection periods. Changes in the flow structure within the nozzle could be the source of this effect. The temporal liquid penetration lengths were derived from the high-speed images. Comparisons were made between different nozzle geometries and different injection pressures. Differences were observed between VCO (Valve Covers Orifice) and mini-sac nozzles, with the mini-sac nozzles showing a higher rate of penetration under the same conditions.
Original languageEnglish
Title of host publicationSAE 2001 World Congress
Number of pages11
Publication statusPublished - Mar 2001
EventSAE 2001 World Congress - Detroit, Michigan, March 5 - 8, 2001
Duration: 1 Jan 2001 → …


ConferenceSAE 2001 World Congress
Period1/01/01 → …

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