Author(s): I D Rus; R A Szakal; S Muntean

Linked Author(s):

Keywords: Attached cavitation; Degradation ratio; NACA0009 hydrofoil; Cavitation models

Abstract: This paper focuses on the development of such a procedure to estimate the cavitation degradation. The first step in the development of this procedure includes the numerical simulation. The determination of the attached cavity length in a two-phase cavitating flow over a NACA0009 hydrofoil for α=2.5° and σ=0.892, 0.81, 0.723 using two cavitation models (Zwart–Gerber–Belamri and Schnerr–Sauer models) is performed. Sensitivity analysis of cavitation models and turbulence quantities selected as inflow boundary conditions are conducted to determine the influence on cavity length. The second step in the development of this procedure estimates the risk degradation corresponding to the attached cavitation for each case relative to a reference one defined by Gülich. The length of the cavity and the mechanical properties of the material are input data for the Gülich model. The degradation ratio associated with attached cavitation over NACA0009 hydrofoil at α=2.5° for three cavitation numbers and two materials (e.g., carbon steel, stainless steel) are estimated.

DOI: https://doi.org/10.1088/1755-1315/1483/1/012001

Year: 2023