Gasoline direct injection requires that the injection time may be very short in duration, indicating that transient flow effects can have a strong influence on the flow behavior and on the spray properties. Consequently, a computational analysis of the dynamic flow in a high pressure swirl injector was conducted. In order to perform the flow simulation during a complete injection event, movement of the needle that controls the amount of fluid to be discharged has been considered and deduced from experimental data.To validate the computational model, the predicted dynamic flow rate, temporal cone angle and instantaneous mass flow rate were compared to experimental data. The calculated results were found to be consistent with measurements.The dynamic calculations allow a better understanding of the complex transient flow during one injection event and may be divided into four different stages where characteristics of the liquid emerging from the nozzle are completely different. In this paper, an attempt for determining the volume of fuel supplied during each stage is proposed.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Transient Flows in High Pressure Swirl Injectors


    Additional title:

    Sae Technical Papers


    Contributors:
    Cousin, J. (author) / Nally, S. (author) / Ren, W. M. (author)

    Conference:

    International Congress & Exposition ; 1998



    Publication date :

    1998-02-23




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Transient flows in high pressure swirl injectors

    Cousin,J. / Ren,W.M. / Nally,S. et al. | Automotive engineering | 1998


    Modeling Swirl Decay Rate of Turbulent Flows in Annular Swirl Injectors

    Choi, Jaehoon / Jung, Eunbeom / Kang, Seongwon et al. | AIAA | 2018


    Modeling of internal flow in high pressure swirl injectors

    Cousin,J. / Nuglisch,H.J. / Univ.et INSA de Rouen,FR et al. | Automotive engineering | 2001


    Modeling of Internal Flow in High Pressure Swirl Injectors

    Nuglisch, H. J. / Cousin, J. | SAE Technical Papers | 2001


    Spray characterization of high pressure gasoline fuel injectors with swirl and non-swirl nozzles

    Li,S.C. / Gebert,K. / Univ.of California,US et al. | Automotive engineering | 1998