Efficient flutter boundary and limit-cycle prediction algorithm based on the time spectral method

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

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Title Efficient flutter boundary and limit-cycle prediction algorithm based on the time spectral method
 
Creator Yiming Gong; <p>School of Aeronautics, Northwestern Polytechnical University</p>
Weiwei Zhang; <p>School of Aeronautics, Northwestern Polytechnical University</p>
 
Subject time spectral method; flutter boundary; limit-cycle oscillation; computational efficiency
 
Description The computational efficiency of traditional time domain numerical method for solving the flutter boundary and limit-cycle oscillation is very low, which limits  its application in engineering . In this paper, we develop an efficient numerical algorithm for predicting the flutter boundary and limit-cycle oscillation based on the time spectral method. The periodic aerodynamic forces can be quickly obtained by the time spectral method and the critical balanced equations are constructed. Then the second  iteration method is used in the solution of the structural equations to avoid trapping the local optimum when searching the balance point. The standard test cases of a two-dimensional transonic airfoil are adopted to verify this algorithm. The results show that this algorithm can  accurately capture the critical characteristic of flutter and limit-cycle oscillation with  very few iteration steps. The calculation results are consistent with those of the traditional time domain method, while the computational efficiency can be improved by 1-2 orders of magnitude. So this algorithm has a very good application prospect.
 
Publisher Paper Management System for FIV2018
 
Contributor National Science Fund for Excellent Young Scholars ( 11622220)
 
Date 2018-05-03 16:32:51
 
Type Peer-reviewed Paper
numerical
 
Format application/pdf
 
Identifier http://www.fiv2018.com/ocs/index.php/fiv2018/fivcan/paper/view/83
 
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 Authors retain copyright over their work, while allowing the conference to place this unpublished work under a 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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