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The Effect of Injection Pressure on Air Entrainment into Transient Diesel Sprays
Technical Paper
1999-01-0523
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The objective of this research was to investigate the effect of injection pressure on air entrainment into transient diesel sprays. The main application of interest was the direct injection diesel engine. Particle Image Velocimetry was used to make measurements of the air entrainment velocities into a spray plume as a function of time and space. A hydraulically actuated, electronically controlled unit injector (HEUI) system was used to supply the fuel into a pressurized spray chamber. The gas chamber density was maintained at 27 kg/m3. The injection pressures that were studied in this current research project were 117.6 MPa and 132.3 MPa.
For different injection pressures, during the initial two-thirds of the spray plume there was little difference in the velocities normal to the spray surface. For the last third of the spray plume, the normal velocities were 125% higher for the high injection pressure case. The velocities tangential to the spray surface showed little variation throughout the spray for both injection pressure cases.
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Citation
Rajalingam, B. and Farrell, P., "The Effect of Injection Pressure on Air Entrainment into Transient Diesel Sprays," SAE Technical Paper 1999-01-0523, 1999, https://doi.org/10.4271/1999-01-0523.Also In
References
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