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Communication Dans Un Congrès Année : 2012

Diesel spray velocity and break-up characterization with dense spray imaging

Résumé

This work presents analysis methods for categorizing breakup morphology in a diesel spray produced by a single-hole, plain orifice diesel injector issuing into ambient atmospheric conditions. Velocity data and images which include the near-nozzle region of a diesel spray were obtained using both time-gated ballistic imaging (BI) and high-resolution ultrafast shadow imaging (USI) measurements. The USI results provide high-resolution visualization of the spray edges and resolved droplets within the depth-of-field of the collection optics, while the BI results provide a view of the spray at a modified dynamic range which mitigates interferences from refracted light and multiple-scattering noise, revealing additional spatial information. Time-correlated image-pairs obtained by both techniques were filtered and cross-correlated on a variety of scales to produce velocity profile data and identifiable structures which can be exploited to differentiate the breakup modes observed in the diesel spray. In addition, a multi-scale analysis was applied to the image data, demonstrating an approach whereby physical parameters can be derived from the image data to quantify the degree of atomization exhibited by a diesel spray.
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Dates et versions

hal-02372402 , version 1 (20-11-2019)

Identifiants

  • HAL Id : hal-02372402 , version 1

Citer

D. Sedarsky, S. Idlahcen, K. Lounnaci, J. Blaisot, C. Rozé. Diesel spray velocity and break-up characterization with dense spray imaging. International Conference on Liquid Atomization and Spray Systems, Sep 2012, Heidelberg, Germany. ⟨hal-02372402⟩
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