Spatio-temporal description of the cavitating flow behavior around NACA 2412 hydrofoil

9th International Symposium on Cavitation

Rudolf, P.^1 ; Štefan, D.^1 ; Sedlá, M.^2 ; Kozák, J.^1 ; Habán, V.^1 ; Huzlík, R.^3

Brno University of Technology, Faculty of Mechanical Engineering, V. Kaplan Department of Fluid Engineering, Technická 2896/2, Brno, Czech Republic^1

Centre of Hydraulic Research, J. Sigmunda 79, Lutín

783 50, Czech Republic^2

Brno University of Technology, Faculty of Electrical Engineering and Communication, Department of Power Electrical and Electronic Engineering, Technická 3082/12, Brno, Czech Republic^3

关键词: Cavitating flow;    Cavitation number;    Eigen modes;    Energy transport;    Flow dynamics;    Most likely;    Proper orthogonal decompositions;    Spatio-temporal description;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012168/pdf
DOI  :  10.1088/1742-6596/656/1/012168

来源: IOP

【 摘 要 】

Spatio-temporal description of the cavitating flow around hydrofoil with 8 degrees incidence using proper orthogonal decomposition (POD) is presented. POD is a suitable tool, which provides information not only about the flow dynamics, but also about relevance of different flow structures. POD also enables to track energy transport within the domain and energy transfer among the eigenmodes of the flow field. Analysis documents change of the flow structure for decreasing cavitation number, which can be most likely attributed to sheet/cloud cavitation transition.