The purpose of this study is to investigate the spray characteristics and ignition stability of gasoline sprays injected from a hole-type nozzle. Using a single-hole VCO (Valve-Covered-Orifice) nozzle, the spray characteristics were studied with LAS (Laser Absorption Scattering) technique, and then flame propagation and ignition stability were investigated inside a high temperature high pressure constant volume vessel using a high speed video camera. The spatial ignition stability of the spray at different locations was tested by adjusting the position of the electrodes. By adjusting the ignition timings, the stable ignition windows for 3 determined locations where the ignition stability was high at a fixed ignition timing were studied. The flame propagation process was examined using high speed shadowgraph method. Experimental results show that when the ignition points are located on the spray axis, the ignition probability is low. When the distance between the ignition point and the spray axis increases, the ignition probability increases and then decreases. High ignition probability distribution did not coincide with vapor phase equivalence ratio distribution. Too dense liquid phase (droplets) will decrease ignition probability, while proper liquid phase density can improve the ignition stability. When the ignition point is located at downstream of the spray, the high ignition probability range becomes a little wider, while the ignition timing should be retarded. After ignition, the flame propagates mainly to the downstream and expands to the radial direction of the spray.


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    Titel :

    Experimental Study on Mixture Formation and Ignition Processes of Spray Injected by Hole-Type Nozzle for DISI Engine


    Weitere Titelangaben:

    Sae Int. J. Engines


    Beteiligte:
    Kataoka, Hajime (Autor:in) / Tian, Jiangping (Autor:in) / Nishida, Keiya (Autor:in)

    Kongress:

    Small Engine Technology Conference & Exposition ; 2011


    Erschienen in:

    Erscheinungsdatum :

    08.11.2011


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Experimental Study on Mixture Formation and Ignition Processes of Spray Injected by Hole-Type Nozzle for DISI Engine

    Tian, J. / Kataoka, H. / Nishida, K. et al. | British Library Conference Proceedings | 2011


    Fuel Spray Evaporation and Mixture Formation Processes of Ethanol/Gasoline Blend Injected by Hole-Type Nozzle for DISI Engine

    Tian, Jiangping / Nishida, Keiya / Sato, Kiyotaka et al. | SAE Technical Papers | 2012


    Fuel Spray Evaporation and Mixture Formation Processes of Ethanol/Gasoline Blend Injected by Hole-Type Nozzle for DISI Engine

    Chato, M. / Fukuda, S. / Sato, K. et al. | British Library Conference Proceedings | 2012


    Mixture Formation and Ignition Processes of Fuel Sprays Injected from Hole-Type Nozzles for DISI Engine

    Tian, J. / Kataoka, H. / Nishida, K. et al. | British Library Conference Proceedings | 2010


    Spray and Flame Behaviors of Ethanol-Gasoline Blend Injected by Hole-Type Nozzle for DISI Engine

    Nishida, Keiya / Chen, Run / Okazumi, Ryoma et al. | SAE Technical Papers | 2015