25th Congress of International Council of the Aeronautical Sciences, 3 - 8 September 2006, Hamburg, Germany
Paper ICAS 2006-10.3.2

A NEW TYPE OF LIMIT CYCLE OSCILLATION OCCURRED IN FLUTTER WING MODEL AT TRANSONIC WIND TUNNEL TESTS

K. Miwa, J. Hatta
Univ. of Fukui, Japan

Keywords: Aeroelasticity, Transonic Flutter, Limit Cycle Oscillation, Subcritical Hopf Bifurcation

In the recent transonic wind tunnel tests for a high aspect ratio wing model, new types of LCO, which shifted to smaller amplitude LCO and finally went down to equilibrium, were observed. The present paper discusses the possibility that these new types of LCO occurred around a saddle-node bifurcation.

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