Optimization of Two-Phase Flow in Injection Nozzles: Interaction of Cavitation and External Jet Formation

Abstract

The present investigation demonstrates the strong interaction of cavitating nozzle flow with the outside jet formation. Due to the strong sensitivity of cavitation on the imposed boundary conditions, simulations with restriction on the internal problem are qualitatively and quantitatively incorrect, so that phenomena like hydraulic flip and supercavitation cannot be revealed. Our results indicate the potential of cavitation for enhancement of atomization and spray quality.

Computational Examination of Unsteady Cavitating Flow Characteristics on a 2D NACA66 Profile by Utilizing OpenFOAM®

“…The applied turbulence model was recently found to be crucial in effectively predicting the unsteady process. Using a Reynolds average Navier-Stokes's equations (RANS) method with a standard 2-equation model, such as k-ε or k-ω, generally results in unrealistic flow stabilizations [25,26]. Modifications are frequently added to these turbulence models to achieve commendable results for unsteady cavitation characteristics.…”