The direct injection (DI) natural gas engine is considered as one of the promising technologies to achieve the continuing goals of the higher efficiency and reduced emissions for internal combustion engines. Shock wave phenomena can easily occur near the nozzle exit when high pressure gaseous fuel is injected directly into the engine cylinder. In the present study, high pressure gas issuing from a prototype gas injector was experimentally studied using planar laser-induced fluorescence (PLIF) technique. Acetone was selected as a fuel tracer. The effects of injection pressures on the flow structure and turbulent mixing were investigated based on a series of high resolution images. The jet macroscopic structures, such as jet penetration, cone angle and jet volume, are analyzed under different injection pressures. Results show that barrel shock waves can significantly influence the jet flow structure and turbulent mixing. With the increase of injection pressure, the jet cone angle and jet volume are obviously increased due to the strong expansion of barrel shock waves. This would be helpful to enhance the fuel-air mixing rate.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Characteristics of High Pressure Jets for Direct Injection Gas Engine


    Additional title:

    Sae Int. J. Fuels Lubr
    Sae International Journal of Fuels and Lubricants


    Contributors:

    Conference:

    SAE 2013 World Congress & Exhibition ; 2013



    Publication date :

    2013-04-08


    Size :

    8 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Fuel-air mixing characteristics of direct injection hydrogen jets

    Owston,R. / Magi,V. / Abraham,J. et al. | Automotive engineering | 2008


    Direct Injection of High Pressure Gas: Scaling Properties of Pulsed Turbulent Jets

    Klaassen, Arno / Doosje, Erik / Baert, Rik | SAE Technical Papers | 2010


    High-Pressure Hydrogen Jet and Combustion Characteristics in a Direct-Injection Hydrogen Engine

    Tomita, Eiji / Roy, Mithun Kanti / Kawahara, Nobuyuki et al. | SAE Technical Papers | 2011


    Development of High Pressure Hydrogen Injector for Direct Injection Engine

    Miyamoto, Y. / Tomita, H. / Tanno, S. et al. | British Library Conference Proceedings | 2010


    R & D of High Pressure Direct Injection Hydrogen Engine Systems

    Takagi, Y. / Yamane, K. / Naganuma, K. et al. | British Library Conference Proceedings | 2008