In order to understand the mechanism of cavity shedding and evolution, turbulent cavitating flows twisted hydrofoil were numerically investigated using k-? turbulence model ZGB cavitation model. The results numerical calculation experimental method are basically consistent, which confirms feasibility This study has obtained following conclusions. Firstly, can be summarized into six stages, shap...

The unsteady RANS equations for a two-dimensional hydrofoil were solved using ANSYS Fluent to model and simulate the at constant Reynolds number, Re, of 2 × 105 fixed reduced frequency, f*, 0.14. simulations performed by varying parameters, such as number deflectors N, tilt angle β, vertical spacing J* = J/c, determine effect upstream deflector’s position on hydrofoil’s performance. results dem...

The present study investigates experimentally and numerically the impact of composite materials on hydro-elastic performances a hydrofoil experiencing Fluid–Structure Interactions, focus bend–twist coupling phenomenon. Four flexible hydrofoils piercing free surface, with identical geometry extruded plan-form, constant NACA0015 section, are tested in cantilevered configuration hydrodynamic flume...

The dynamics of cloud cavitation about a three-dimensional hydrofoil are investigated experimentally in tunnel with depleted, sparse and abundant free-stream nuclei populations. A rectangular planform, NACA 0015 was tested at Reynolds number $1.4\times 10^{6}$ , an incidence $6^{\circ }$ range numbers from single-phase flow to supercavitation. High-speed photographs shedding phenomena were acqu...

Investigations of attached partial cavitation are important because to prevent damages in hydrulic machinery and to reduce the costs. As expected computational fluid dynamics (CFD) methods have been developed for more than 40 years to understand this phenomenon and to improve the machinery designs, as pumps and hydraulic turbines. However, cavitation appears at high Reynolds numbers, so that, t...