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Evaluation of the effect of injector deposits on diesel combustion


Project description

In this project we are looking into the effect of diesel injector tip deposits on the fuel spray evolution. The figure below shows the structure of sprays from a new injector on the left and the used injector on the right, which are prone to have deposits. Sudden radial spreading of sprays was observed for used injectors, appears as a bulge on the right image. In addition to this there are several other undesirable features observed from these nozzles. This clearly shows that injector deposits can have a detrimental effect of emissions.


  • R. Pos, R. Cracknell, L. Ganippa, Transient characteristics of diesel sprays from a deposit rich injector, FUEL 2015.
  • R. Pos, R. Cracknell, L. Ganippa, Characteristics of high pressure diesel sprays at the end of injection, IMechE London ICE Conference December 2015
  • R. Pos, L. Ganippa, Comparison of spray characteristics from different nozzles and fuels in a non-reactive medium, FISITA 2014.
  • R. Cracknell, R. Wardle, R. Pos, L. Ganippa, Effect of diesel injector tip deposits on transient spray behaviour, Baden-Baden 2016