The Effect of Injection Pressure on Air Entrainment into Transient Diesel Sprays

Babu V. Rajalingam; Patrick V. Farrell

doi:10.4271/1999-01-0523

1999-03-01

The Effect of Injection Pressure on Air Entrainment into Transient Diesel Sprays 1999-01-0523

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.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

The Effect of Injection Pressure on Air Entrainment into Transient Diesel Sprays 1999-01-0523

SAE MOBILUS