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Communication Dans Un Congrès Année : 2016

Simultaneous high-speed internal and external flow measurements for a high-pressure diesel nozzle

Loïc Méès
Marc Michard
  • Fonction : Collaborateur
  • PersonId : 180714
  • IdHAL : marc-michard
David Maligne
  • Fonction : Auteur du matériel d'accompagnement

Résumé

We present an extensive experimental study focused on understanding the impact of cavitation in a high-pressure diesel nozzle on the macroscopic properties of fuel spray. Several high-speed videos of the liquid flow through a transparent, asymmetric cylindrical nozzle with a single orifice (phi = 0.35 mm) are recorded along with the videos of the resulting spray in the near-nozzle region, issued with an injection pressure of 300 bar at a frame-rate of 75 kHz. The high-repetition images of the internal flow are then used to estimate the onset of cavitation inside the transparent nozzle and the probability of development of cavitation in different regions of the nozzle with an average estimate of the amount of cavitation with time. On the other hand, recorded spray images are used to study spray penetration, cone-angles and velocity from the start of fuel injection. A novel approach is proposed for the measurement of perturbations that occur in form of big liquid structures along the spray boundary.
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Dates et versions

hal-01362773 , version 1 (09-09-2016)

Licence

Paternité - Pas d'utilisation commerciale - Pas de modification

Identifiants

Citer

Harsh Purwar, Saïd Idlahcen, Loïc Méès, Claude Rozé, Jean-Bernard Blaisot, et al.. Simultaneous high-speed internal and external flow measurements for a high-pressure diesel nozzle. 27th European Conference on Liquid Atomization and Spray Systems, Sep 2016, Brighton, United Kingdom. ⟨hal-01362773⟩
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