Cavitation and Internal Injector Flows

Vehicle emissions strongly depend on the quality of the combustion inside the chamber which is, in turn, affected by the spray behavior exiting the injector, and thus by the characteristics of the internal injector flow. The flow is characterized by geometrical complexity, high-pressure (~100/1000 bar), flow separation and turbulence interacting with cavitation in channel of very small size (~100 μm).

Main research activities on this topic:

  • Numerical simulations of both simplified and realistic internal injector flows in high-pressure cavitating conditions
  • Analysis of both liquid-into liquid (2-phase flow) and liquid-into-air (3-phase flow) injections
  • Calibration of modeling parameters through stochastic approach against experimental data
  • Accuracy and reliability of URANS and LES simulations

Research group

Maria Vittoria Salvetti,
Alessandro Anderlini

External collaborations:
Antonio Agresta, Vitesco Technologies Italy SRL


Funding:

Continental Automotive Italy SPA
Vitesco Technologies Italy SRL

Main publications:

  • A. Anderlini, M. Salvetti, A. Agresta, L. Matteucci, ‘Stochastic sensitivity analysis of numerical simulations of injector internal flows to cavitation modeling parameters’ (2019) Computers & Fluids, 183, 130-147
  • A. Anderlini, M. Salvetti, A. Agresta, L. Matteucci, ‘Cavitation model parameter calibration for simulations of three-phase injector flows’, Quantification of Uncertainty: Improving Efficiency and Technology-QUIET selected contributions, ed. M. D’Elia,M. Gunzburger, G. Rozza (Eds), Lecture Notes in Computer Science, Springer (2020)