In direct-injection (DI) gasoline engines, spray characteristics greatly affect engine combustion. For the rapid development of new gasoline direct-injectors, it is necessary to predict the spray characteristics accurately by numerical analysis based on the injector nozzle geometry.In this study, two-phase flow inside slit nozzle injectors is calculated using the volume of fluid method in a three-dimensional CFD. The calculation results are directly applied to the boundary conditions of spray calculations, of which the submodels are recently developed to predict spray formation process in direct injection gasoline engines.The calculation results are compared with the experiments. Good agreements are obtained for typical spray characteristics such as spray shape, penetration and Sauter mean diameter at both low and high ambient pressures. Two slit nozzle injectors of which the slit thickness is different are compared. It is shown that the slit thickness controls the liquid sheet thickness and velocity distributions at the nozzle exit, and influences the spray tip shape and the Sauter mean diameter.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Fuel Spray Simulation of Slit Nozzle Injector for Direct-Injection Gasoline Engine


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2002 World Congress & Exhibition ; 2002



    Publication date :

    2002-03-04




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Fuel spray simulation of slit nozzle injector for direct-injection gasoline engine

    Hayakawa,M. / Takada,S. / Yonesige,K. et al. | Automotive engineering | 2002


    Slit Nozzle Injector for A New Concept of Direct Injection SI Gasoline Engine

    Yoneshige, Kazuhiro / Takeda, Keiso / Ogawa, Minoru et al. | SAE Technical Papers | 2000


    Slit nozzle injector for a new concept of direct injection spark ignition gasoline engine

    Takeda,K. / Sugimoto,T. / Tsuchiya,T. et al. | Automotive engineering | 2000


    Development of a Slit Nozzle Injector for a New-Concept Direct-Injection SI Gasoline Engine

    Sugimoto, T. / Takeda, K. / Tsuchiya, T. et al. | British Library Online Contents | 2002


    Visualization Analysis of Fuel Flow inside Slit Nozzle for Direct Injection SI Gasoline Engine

    Matsumura, E. / Tomoda, T. / Takeda, K. et al. | British Library Conference Proceedings | 2003