A 1D flash evaporation model is being developed to capture the effects of bubble nucleation and growth inside multi-hole injector nozzles to investigate the flash evaporation in fuel injector sprays in Gasoline Direct Injection (GDI). The 1D nozzle flow model helps to understand the effects of main physical and geometrical parameter in promoting the fuel flash evaporation. This model is based on a weakly compressible homogenous two-phase mixture assumption. A non-equilibrium model is used to predict the vapour formation rate along the nozzle. A fully explicit method based on a two-step Lax-Wendroff method is used together with a TVD scheme. An atomisation model has been proposed to correlate the void fraction at nozzle exit to probability function of the liquid droplets generated from flashing atomisation. An accurate two phase speed of sound is adopted allowing one to predict the choked flow conditions once saturation has been reached. Metastable state are not considered in this first approach. An extensive assessment of model capability considering both a basic test case with water injection and an engine-like gasoline injection.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The Prediction of Flash Atomization in GDI Multi-Hole Injectors


    Additional title:

    Sae Technical Papers


    Contributors:
    Forte, C. (author) / Cazzoli, G. (author) / Bianchi, G. M. (author) / Pelloni, P. (author) / Negro, S. (author)

    Conference:

    SAE World Congress & Exhibition ; 2009



    Publication date :

    2009-04-20




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    The prediction of flash atomization in gasoline direct injection multi-hole injectors

    Bianchi,G.M. / Negro,S. / Forte,C. et al. | Automotive engineering | 2009


    A 1d Model for the Prediction of Flash Atomization in Gdi Multi-Hole Injectors: Preliminary Results

    Bianchi, G.M. / Forte, C. / Negro, S. et al. | British Library Conference Proceedings | 2008


    A 1d Model for the Prediction of Flash Atomization in Gdi Multi-Hole Injectors: Preliminary Results

    Forte, C. / Bianchi, G. M. / Pelloni, P. et al. | SAE Technical Papers | 2008


    Propellant Atomization for Porous Injectors

    Deeken, J. C. / Suslov, D. I. / Oschwald, M. et al. | AIAA | 2019

    Free access

    Atomization in Coaxial-Jet Injectors

    Vingert, L. / Gicquel, P. / Ledoux, M. et al. | British Library Conference Proceedings | 2004