Influence of turbulence models in the prediction of cavitation occurrence

Adriano Evangelisti; Giuliano Agati; Hamidreza Haghighifard; Franco Rispoli; Paolo Venturini; Domenico Borello

doi:10.29008/ETC2023-179

15^th European Conference on Turbomachinery Fluid dynamics & Thermodynamics

Paper ID:

ETC2023-179

Main Topic:

Turbulence modelling

https://doi.org/10.29008/ETC2023-179

Authors

Adriano Evangelisti - Sapienza - University of Rome, Italy
Giuliano Agati - Sapienza - University of Rome, Italy
Hamidreza Haghighifard - Sapienza - University of Rome, Italy
Franco Rispoli - Sapienza - University of Rome, Italy
Paolo Venturini - Sapienza - University of Rome, Italy
Domenico Borello - Sapienza - University of Rome, Italy

Abstract

In the present paper the effect of turbulence models on cavitation occurrence is evaluated by means of numerical simulations on a NACA 66 (MOD) profile. Here, cavitation will be assessed through the employment of the widely applied Singhal et al. model, imprinted on the use of the Rayleigh-Plesset equation for bubble dynamics description.A practical application of the treated cavitation model is carried out in conjunction with the employment of the Scale Adaptive Simulation (SAS) turbulent model on a 2D NACA test case, focusing the attention on the effect derived from time dependent fluctuations phenomena occurring during cavitation manifestations. Results are then discussed comparing experimental data and simulation-obtained values of the non-dimensional pressure coefficients.