For better understanding of soot formation and oxidation processes in a diesel spray flame, morphology, microstructure and size of soot particles directly sampled at different locations in the spray flame (40mm to 90mm from injector nozzle tip) were investigated using a high-resolution transmission electron microscope (HRTEM). The diesel spray flame was achieved in a constant volume combustion chamber under diesel-like conditions (2.5MPa and 940K). The concentration, diameter of primary particles and the radius of gyration of soot aggregates increased in the upstream region (40 to 50mm), exhibited a peak around the mid-stream region (60 to 70mm), and then decreased in the downstream region (80 to 90mm) from the injector nozzle tip, which corresponds to formation, peak concentration and oxidation of soot particles in the spray flame, respectively. The fractal dimension of soot aggregates was also analyzed and is almost constant, with a value of approximately 1.73 over different axial locations in the spray flame.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    High-Resolution Transmission Electron Microscopy of Soot Directly Sampled at Different Axial Locations in Diesel Spray Flame


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Nishigai, Hiroki (Autor:in) / Kondo, Katsufumi (Autor:in) / Takano, Satoshi (Autor:in) / Yamaguchi, Teruo (Autor:in) / Aizawa, Tetsuya (Autor:in)

    Kongress:

    10th International Conference on Engines & Vehicles ; 2011



    Erscheinungsdatum :

    2011-09-11




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Transmission Electron Microscopy of Soot Particles sampled directly from a Biodiesel Spray Flame

    Genzale, Caroline L. / Iguma, Hiroki / Nishigai, Hiroki et al. | SAE Technical Papers | 2011


    Transmission Electron Microscopy of Soot Particles Directly Sampled in Diesel Spray Flame - A Comparison between US#2 and Biodiesel Soot

    Genzale, Caroline / Nishigai, Hiroki / Nerva, Jean-Guillaume et al. | SAE Technical Papers | 2012


    Nanostructure Analysis of Primary Soot Particles Directly Sampled in Diesel Spray Flame via HRTEM

    Iguma, Hiroki / Kondo, Katsufumi / Sakai, Masanori et al. | SAE Technical Papers | 2012


    Direct Sampling, TEM Analysis and Optical Measurement of Soot Particles at Different Axial Locations in a Transient Spray Flame

    Nishigai, Hiroki / Kondo, Katsufumi / Takano, Satoshi et al. | SAE Technical Papers | 2011