The spray model has been applied to a number of conditions, ranging from low-pressure fuel injectors to high-pressure  common rail Diesels. Various automotive nozzle designs have been simulated with surrounding air conditions ranging from atmospheric and room temperature to very high pressure/temperatures of super-charged Diesels.

(click image for animation)

Adaptive local grid refinement performed during the spray development allows faster calculation and more accurate simulation of the air-entrainment process.

Non-evaporating spray                                  Evaporating spray

(click images for animation)

Example of Diesel spray development under non-evaporating and evaporating conditions.

Non-evaporating spray: Droplet size plotted proportional to diameter and color according to droplet velocity. Spray-induced air velocity vectors are also shown while the 3-D surface plot shows the magnitude of air velocity component in the direction of injection.

Evaporating spray: Droplet size plotted proportional to diameter and colored on temperature. Spray-induced air velocity vectors are also shown while the 3-D surface plot shows the magnitude of the air velocity in the direction of injection. The vaporised fuel distribution is also plotted.

(click image for animation)

Low-pressure gasoline injectors are used with port-injected engines. Spray impingement on wall and formation of liquid film is important for the engine performance and exhaust emissions.

Top of page

Send mail to info@fluid-research.com with questions or comments about this web site.
Copyright © 2005 Fluid Research