HydroCav

Research activities

Cavitation modelling for steady and unsteady CFD simulations
Experimental and numerical optimization of passive cavitation controllers

Projects

Cavitation in hydraulic is an important phenomenon to be considered for performance predictions. Correct analysis of the cavitation onset and development and its effect on the flow field while diminishing the pressure level need to be investigated. Particular attention is given to the coupling between cavitation and turbulence models as well as on the underlying numerical procedure. The performance of the proposed models will be initially assessed on simple cases in steady case. In a second step results for different applications will be presented with pitching foils. The final purpose of the project will be to design a passive controller on the hydrofoils able to decrease and control the size of the cavitating bubble around the hydrofoil and the lift oscillatione related to the shear cavitation. For the purpose, appendages, and vortex generator will be considered. The size, the height and the location will be considered to optimize the compromise between cavitation and lift reduction. The results will be compared with the experimental date on steady and pitchig hydrofoils.

Attracting Lagrangian Coherent Structures ALCSs

Repelling Lagrangian Coherent Structures RLCSc

Tools

Facility – Cavitation Facility

Mesh Tools – ICEM and Salome

CFD Tools – ANSYS CFX and OpenFOAM

Post Processing Tools – VTK, Paraview, Matlab and Python

Publications

Tingyun Yin, Giorgio Pavesi, Ji Pei, Shouqi Yuan, Giovanna Cavazzini, Guido Ardizzon (2021) Lagrangian Analysis of Unsteady Partial Cavitating Flow Around a Three-Dimensional Hydrofoil, Journal of Fluids Engineering 143(4 – April), p. 1-11, doi:10.1115/1.4049242
Tingyun Yin, Giorgio Pavesi, Ji Pei, Shouqi Yuan (2021) Numerical analysis of unsteady cloud cavitating flow around a 3D Clark-Y hydrofoil considering end-wall effects, Ocean Engineering 219(April 2020), p. 103506, Elsevier Ltd, url, doi:10.1016/j.oceaneng.2020.108369
Tingyun Yin, Giorgio Pavesi, Ji Pei, Shouqi Yuan (2021) Numerical investigation of unsteady cavitation around a twisted hydrofoil, International Journal of Multiphase Flow 135, p. 103506, Elsevier Ltd, url, doi:10.1016/j.ijmultiphaseflow.2020.103506
Tingyun Yin, Giorgio Pavesi, Ji Pei, et al. (2020) Numerical investigation of unsteady cavitation around a twisted hydrofoil. International Journal of Multiphase Flow, 135: 103506. DOI: 10.1016/j.ijmultiphaseflow.2020.103506
Tingyun Yin, Giorgio Pavesi, Ji Pei et al. (2020) Numerical analysis of unsteady cloud cavitating flow arounda 3D Clark-Y hydrofoil considering end-wall effects. Ocean Engineering, 2020, 219: 108369. DOI: 10.1016/j.oceaneng.2020.108369
Tingyun Yin, Giorgio Pavesi, Ji Pei, et al. (2020) Lagrangian Analysis of Unsteady Partial Cavitating Flow Around a Three-Dimensional Hydrofoil. Journal of Fluids Engineering, 2020. DOI: https://doi.org/10.1115/1.404924
Tingyun Yin, Giorgio Pavesi, Ji Pei, et al.(2018) Comparison of Various Turbulence Models Applied to a Twisted Hydrofoil. Proceedings of the 10th International Symposium on Cavitation (CAV2018). United States. ASME Press, 2018. DOI: 10.1115/1.861851_ch52.