Browse Publications Technical Papers 2016-01-2202

Integrated Computational Study for Total Atomization Process of Primary Breakup to Spray Droplet Formation in Injector Nozzle 2016-01-2202

The advanced development and optimization of fuel atomization in port and direct injection systems for automobile engine is desired for the improvement of fuel combustion performance and thermal efficiency of the engine. Computational prediction and design of injector nozzle spray flow is an effective method for that. However, a practical simulation method of the continuous primary, secondary spray breakups and the spraying behavior have not been developed yet. In this study, we have developed the integrated computational method of the total fuel atomization process of the injector nozzle. This new computational approach is taking into account the nozzle internal flow to form the primary breakup using Volume of Fluid (VOF) method in connection with the spray flow characteristics to the engine cylinder using Discrete Droplet Model (DDM). The flow field data of fuel velocity, turbulent energy and dissipation rate obtained by Eulerian approach (VOF) are transferred to Lagrangian process (DDM) as the initial numerical conditions of the droplet velocity, diameter and flow rate. For flow field data acquisition to transfer process (VOF to DDM), we have newly developed the coupler software named VOF-DDM Bridge Tool (VDBT). The presented numerical method is available to predict the fuel spray angle, the particle size distribution and the behavior of the spray penetration in total atomization and spray process. Furthermore, we confirmed that the obtained numerical results shows reasonably agreement with the optical spray measurement results.


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


Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Experimental Investigation for Combustion Stability of Semi Direct Electronic Injection in Four Stroke SI Engine


View Details


Application of Fluid Dynamics Model to Estimate Cylinder Intake Volume


View Details


A Three-Zone Heat Release Model for DI Diesel Engines


View Details