Measurement of Soot Concentration in a Prototype Multi-Hole Diesel Injector by High-Speed Color Diffused Back Illumination Technique

Paper #:
  • 2017-01-2255

Published:
  • 2017-10-08
Abstract:
In this article, a prototype multi-hole diesel injector from a high-pressure common rail system is used in a high-pressure and high-temperature test rig capable of reaching 1100 Kelvin and 150 bars under different oxygen concentrations. A novel optical set-up capable of visualizing the soot cloud evolution from 30 to 85 millimeters from the nozzle exit with the high-speed color diffused back illumination technique is used thanks to the insertion of a high-pressure window in the injector holder opposite to the frontal window of the vessel. Experimental results show the reduction of soot formation with an increase in injection pressure, a reduction in chamber temperature, a reduction in oxygen concentration or a reduction in chamber density.
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