|Title||Essam Abo-Serie, Seoksu Moon and Choongsik Bae, "Near-Nozzle Liquid Flow and Spray Characteristics of DISI Swirl Injectors," pp255-261, Proc. 8th ILASS-Asia (Liquid Atomization and Spray Systems), Seoul, Oct. 2005. 10.|
Essam Abo-Serie, Seoksu Moon and Choongsik Bae, “Near-Nozzle Liquid Flow and Spray Characteristics of DISI Swirl Injectors,” pp255-261, Proc. 8th ILASS-Asia (Liquid Atomization and Spray Systems), Seoul, Oct. 2005. 10.
A simple model has been employed in this study to identify the liquid film and spray profile near the nozzle exit of DISI swirl injectors. The forces action on the liquid film after in emerges from the nozzle cause the film to diverge away from the nozzle centerline forming a conical spray structure. After the film breaks-up, the separated droplets from the liquid film are then further diverged until an asymptotic divergence angle which is equal to the nozzle spray angle is reached. The ecvelop of the liquid film and spray droplets motion was compared with the spray images close to the nozzle exit to identify the initial velocity of the droplets after film break-up. A parametric study examining the factors affecting the initial formation of spray has been performed and three angle have been distinguished;flow angle at the nozzle exit, liquid film divergent angle and nozzle spray angle. The factors affection each of the three angles gave been investigated and the relationship between these angles is also deduced. The model showed a reasonable agreement with the experimental results although further development cluld be achieved to improve the accuracy of prediction. This model could easily be implemented as a sub-model to link the international mozzle flow model with the conventional spray modle. It also provides an estimate for the necessary initial conditions needed for the atomization and spray models.