Experimental analysis and modeling of limit cycles in a dynamic wind-tunnel rig

P Davison, MH Lowenberg, M Di Bernardo

Research output: Contribution to journalArticle (Academic Journal)peer-review

27 Citations (Scopus)

Abstract

Large-amplitudeself-sustaining periodic oscillationshavebeen observed in an unforced pitch-axis single-degreeof-freedom dynamic wind-tunnel rig. These limit-cycle oscillations and the associated bifurcations are caused by aerodynamic phenomena and have been studied by constructing experimental bifurcation diagrams,where a system parameter (horizontal tailplane de� ection) is varied quasi statically and the steady-state response of the system recorded. An innovative strategy based on these bifurcation diagramsis then used to identify amathematical model of the rig aerodynamics over a wide operating region. Good agreement is shown between numerical simulations of the theoreticalmodeland experimental time histories over a large range of angle-of-attackand tailplane de� ections.
Translated title of the contributionExperimental analysis and modeling of limit cycles in a dynamic wind-tunnel rig
Original languageEnglish
Pages (from-to)776 - 785
Number of pages10
JournalJournal of Aircraft
Volume40 (4)
Publication statusPublished - Jul 2003

Bibliographical note

Publisher: American Institute of Aeronautics and Astronautics

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