A joint experimental and numerical study of fluid structure interaction on a flexible lightweight hydrofoil in partial cavitating flow

9th Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, Flow-Induced Vibration & Noise

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Title A joint experimental and numerical study of fluid structure interaction on a flexible lightweight hydrofoil in partial cavitating flow
 
Creator Jacques Andre Astolfi; French Naval Academy
 
Subject Fluid-Stucture-Interaction; cavitation
 
Description Marine engineering applications show an interest for the design of nonmetallic structures. Expected advantages are a weight reduction, a corrosion resistance, together with a decrease of the production cost. Another but very challenging point could be to take benefit of the structure flexibility to control the system performances by passive or active means. However this must be mitigate by the mechanical resistance to strong operating conditions. From an academic point of view it gives rise to fundamental questions about the coupling between lightweight flexible structures and a heavy fluid like water in a flow potentially cavitating specially at high velocity applications. The present paper deals with an original experimental and numerical program in order to analyze the hydro-elastic response of a flexible homogeneous hydrofoil in various flow conditions including cavitating flow. The approach is based on coupling industrial CFD/CSD codes including a cavitation model and original experiments performed in a cavitation tunnel on the same configuration. The hydrofoil is instrumented with strain gauges for measuring strains and stresses. The numerical method is based on a partitioned approach with a code coupling between CFX for the fluid and Mechanical for the structure. The fluid domain is solved with a finite-volume URANS method and the structure is resolved with FEM solver. It is shown the possibility for the CSD/CFD code to compute this complex flow structure problem and that the numerical results compares favorably with the experiments. Several results based on the joint approach will be presented in the paper.
 
Publisher Paper Management System for FIV2018
 
Contributor French Naval Academy
 
Date 2018-05-07 15:12:31
 
Type Peer-reviewed Paper
experimental and numerical
 
Format application/pdf
 
Identifier http://www.fiv2018.com/ocs/index.php/fiv2018/fivcan/paper/view/203
 
Source Paper Management System for FIV2018; FIV2018 Conference
 
Language en
 
Rights Authors who submit to this conference agree to the following terms:<br /> <strong>a)</strong> Authors retain copyright over their work, while allowing the conference to place this unpublished work under a <a href="http://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution License</a>, which allows others to freely access, use, and share the work, with an acknowledgement of the work's authorship and its initial presentation at this conference.<br /> <strong>b)</strong> Authors are able to waive the terms of the CC license and enter into separate, additional contractual arrangements for the non-exclusive distribution and subsequent publication of this work (e.g., publish a revised version in a journal, post it to an institutional repository or publish it in a book), with an acknowledgement of its initial presentation at this conference.<br /> <strong>c)</strong> In addition, authors are encouraged to post and share their work online (e.g., in institutional repositories or on their website) at any point before and after the conference.
 

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