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A pulse size estimation method for reduced-order models

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)1891-1916
Number of pages26
JournalAeronautical Journal
Volume120
Issue number1234
Early online date21 Nov 2016
DOIs
DateIn preparation - 2016
DateAccepted/In press - 28 Jul 2016
DateE-pub ahead of print - 21 Nov 2016
DatePublished (current) - 1 Dec 2016

Abstract

Model order reduction (MOR) is an important technique that allows reduced order models (ROMs) of physical systems to be generated that can capture the dominant dynamics, but at lower cost than the full order system. One approach to MOR that has been successfully implemented in fluid dynamics is the Eigensystem Realization algorithm (ERA). This method requires only minimal changes to the inputs and outputs of a CFD code so that the linear responses of the system to unit impulses on each input channel can be extracted. One of the challenges with the method is to specify the size of the input pulse. An inappropriate size may cause a failure of the code to converge due to non-physical behaviour arising during the solution process. This paper addresses this issue by using piston theory to estimate the appropriate input pulse size.

    Research areas

  • CFD, eigensystem realisation algorithm, pulses, reduced order models

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  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the accepted author manuscript (AAM). The final published version (version of record) is available online via Cambridge University Press at https://doi.org/10.1017/aer.2016.111. Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 522 KB, PDF document

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