Injector nozzle spray on compressed natural gas engines: A technical review


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In this article, previous work on the application of injector on CNG engines is reviewed. In the review of injector, the spray characteristics, the gas jet structure, the effect of injector nozzle geometry on fuel-air mixing, injector nozzle coefficients of discharge, injector nozzle spray tip penetration and cone angle as well as injector nozzle orifice shapes are outlined. Fuel-air mixing increases as the orifice diameter decreases. This can be a significant advantage for small orifice nozzles. However, multiple orifices are required to meet the desired mass flow rate as orifice diameter decreases.

Original languageEnglish
Pages (from-to)1035-1043
Number of pages9
JournalInternational Review of Mechanical Engineering
Issue number5
Publication statusPublished - Jul 2012


  • Fuel-air mixing
  • Gas jet structure
  • Injector nozzle
  • Nozzle orifice shapes
  • Spray characteristic


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