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research-article

Numerical simulation of added mass effects on a hydrofoil in cavitating flow using acoustic FSI

[+] Author and Article Information
Xin Liu

Huaneng Clean Energy Research Institute, Beijing 102209, China
xin-liu@foxmail.com

Lingjiu Zhou

College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100084, China
zlj@cau.edu.cn

Xavier Escaler

Center for Industrial Diagnostics, Universitat Politècnica de Catalunya, Av.Diagonal 647, 08028 Barcelona, Spain
escaler@mf.upc.edu

Zhengwei Wang

State Key Laboratory of Hydroscience and Engineering & Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
wzw@mail.tsinghua.eud.cn

Yongyao Luo

State Key Laboratory of Hydroscience and Engineering & Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
luoyy@tsinghua.edu.cn

Oscar De La Torre

Alstom Hydro España S.L., WTC Almeda Park, Plaça de la Pau s/n Edif 3 - 3º planta, 08940 Cornellà, Spain
dela.oscar@gmail.com

1Corresponding author.

ASME doi:10.1115/1.4035113 History: Received February 19, 2016; Revised September 12, 2016

Abstract

A fluid-structure interaction system has been solved using the coupled acoustic structural finite element method to simplify the cavitating flow conditions around a hydrofoil. The modes of vibration and the added mass effects have been numerically simulated for various flow conditions including leading edge attached partial cavitation on a 2D NACA0009 hydrofoil. The hydrofoil has been first simulated surrounded by only air and by only water. Then, partial cavities with different lengths have been modeled as pure vapor fluid domains surrounded by the corresponding water and solid domains. The obtained numerical added mass coefficients and mode shapes are in good agreement with the experimental data available for the same conditions. The study confirms that the fluid added mass effect decreases with the cavitation surface ratio and with the thickness of the cavitation sheet. Moreover, the simulations also predict slight mode shape variations due to cavitation that have also been detected in the experiments. Finally, the effects of changes in cavity location have been evaluated with the previously validated model.

Copyright (c) 2016 by ASME
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