Abstract
The non-circular orifice has potential ability to increase the fuel spray and mixing quality. While the application of non-circular orifice in the GDI injection system hasn't been reported yet. The inner flow behaviors have great impact on the spray and mixing quality. Therefore, Volume of Fluid (VOF) and Large Eddy Simulation (LES) method are introduced to investigate the effects of non-circular orifices cross section shapes of GDI injector on the inner flow patterns and nozzle exit flow parameters. From the results, the total vapor phase volume fraction of the elliptical orifice is smaller than that in the circular one. The vapor phase fraction of elliptical orifice decreases with the increase of aspect ratio, and the vapor phase volume fraction of the elliptical E4 orifice is the smallest. In addition, the critical cavitation point of circular orifice is earlier than that of elliptical orifice, which indicated that the circular orifice is more prone to cavitate than the elliptical one. Finally, the discharge coefficient of circular orifice is the smallest among all orifices. The velocity coefficient of elliptical E4 orifice is the minimum under the cavitation conditions, while the elliptical E4 orifice held the largest area coefficient among other orifices.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Communications in Heat and Mass Transfer
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
