Fuel spray breakup in combustion engines and hence all following processes are determined by the primary atomization. Due to high optical densities as well as high velocities and structures in the μm-range, the measurement of sprays in the near nozzle region is extremely challenging. Therefore, the processes of the primary breakup are not fully understood yet, although these processes are very important for simulation of spray atomization. One important property of a spray is the velocity distribution close to the nozzle outlet. With the newly developed Structural Image Velocimetry (SIV) technique it is possible to visualize spray structures in the near nozzle region and track them via cross-correlation algorithms, so that two-dimensional velocity fields of the spray can be derived. The initial SIV technique is improved with a new high-speed setup, allowing to observe also the temporal behavior of the spray velocities during the injection. Within this work, velocities of potential future diesel fuels were measured under engine relevant conditions with a variation of fuel pressure, fuel temperature and gas pressure based on the ECN Spray A conditions. Velocity fields of Oxymethlyenether 3-5 (OME) as an E-Fuel and Hydrogenated Vegetable Oil (HVO) as a Bio-Fuel were measured and compared with Gas-to-Liquid Diesel (GTL) as a reference fuel. For constant fuel pressures, the velocity distribution for OME shows significantly different values than for GTL and HVO, having about 15 % lower values and much lower deceleration behavior in downstream direction. Obviously the OME spray has a weaker air-fuel interaction. This can be attributed to a lower density leading to reduced nozzle outlet velocities and a lower Weber number.


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    Titel :

    Velocity Field Measurements with High Speed Structural Image Velocimetry in the Primary Atomization Region of Future Diesel Fuels


    Weitere Titelangaben:

    Sae Int. J. Adv. and Curr. Prac. in Mobility


    Beteiligte:

    Kongress:

    SAE Powertrains, Fuels & Lubricants Meeting ; 2020



    Erscheinungsdatum :

    2020-09-15


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Velocity Field Measurements with High Speed Structural Image Velocimetry in the Primary Atomization Region of Future Diesel Fuels

    Dageförde, Toni / Gröger, Karsten / Kawaharada, Noritsune et al. | British Library Conference Proceedings | 2020


    Velocity Field Measurements with High Speed Structural Image Velocimetry in the Primary Atomization Region of Future Diesel Fuels

    Dageförde, Toni / Gröger, Karsten / Kawaharada, Noritsune et al. | British Library Conference Proceedings | 2020


    Velocity Field Measurements with High Speed Structural Image Velocimetry in the Primary Atomization Region of Future Diesel Fuels

    Dageförde, Toni / Gröger, Karsten / Kawaharada, Noritsune et al. | British Library Conference Proceedings | 2020


    Particle Image Velocimetry Measurements of a Diesel Spray

    Hillamo, Harri / Larmi, Martti / Kaario, Ossi | SAE Technical Papers | 2008


    Medium Speed Diesel Series Designed For Future Fuels

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