Prediction of Limit Cycle Oscillations Using an Implicit Aeroelastic-Harmonic Balance Method

Simão Marques, Weigang Yao

Research output: Contribution to conferencePaper

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Abstract

This work proposes a extends a novel approach to compute tran sonic Limit Cycle Oscillations using high fidelity analysis. CFD based Harmonic Balance methods have proven to be efficient tools to predict periodic phenomena. This paper’s contribution is to present a methodology to determine the unknown frequency of oscillations using an implicit for- mulation of the HB method to accurately capture Limit Cycle Oscillations (LCOs); this is achieved by defining a frequency updating procedure based on a coupled CFD/CSD Harmonic Balance formulation to find the LCO condition. A pitch/plunge aerofoil and respective linear structural models is used to exercise the new method. Results show consistent agreement between the proposed and time-marching methods for both LCO amplitude and frequency.
Original languageEnglish
Publication statusPublished - 08 Oct 2014
EventRoyal Aeronautical Society Aircraft 4th Structural Design Conference - Belfast, United Kingdom
Duration: 07 Oct 201409 Oct 2014

Conference

ConferenceRoyal Aeronautical Society Aircraft 4th Structural Design Conference
CountryUnited Kingdom
CityBelfast
Period07/10/201409/10/2014

Keywords

  • CFD
  • Harmonic Balance
  • Aeroelasticity
  • LCO

ASJC Scopus subject areas

  • Aerospace Engineering

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    Marques, S., & Yao, W. (2014). Prediction of Limit Cycle Oscillations Using an Implicit Aeroelastic-Harmonic Balance Method. Paper presented at Royal Aeronautical Society Aircraft 4th Structural Design Conference, Belfast, United Kingdom. http://aerosociety.com/Assets/Docs/Events/740/740_programme_print.pdf