Stochastic flutter of multi-stable non-linear airfoil in turbulent flow

• Autorzy: Hao Ying , Wu Zhi-Qiang

Identyfikatory

DOI

10.15632/jtam-pl/115367

• Języki publikacji: EN

Abstrakty

EN

Stochastic airfoil flutter in an unsteady flow is discussed using the stochastic P-bifurcation method, taking into account potential effects of the longitudinal and vertical turbulent flow. The critical conditions of stochastic P-bifurcation are deduced by stochastic singularity analysis in order to discuss stochastic P-bifurcation phenomena. The results of parameter analysis show that as the turbulent intensity increases, the critical flutter velocity for sharp stochastic airfoil flutter decreases. And the large amplitude vibration comes earlier; an increase in the turbulent scale causes an earlier appearance of the critical velocity for large amplitude stochastic flutter.

Słowa kluczowe

EN

stochastic P-bifurcation; turbulence; stochastic flutter

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2020
• Tom: Vol. 58 nr 1
• Strony: 155--168
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Hao Ying

• School of Mechanical Engineering, Tianjin University, Tianjin, China
• College of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, China

autor

Wu Zhi-Qiang

• School of Mechanical Engineering, Tianjin University, Tianjin, China

Bibliografia

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• 17. Yuan W., Poirel D.C., Wang B., 2013, Simulations of pitch-heave limit-cycle oscillations at a transitional Reynolds number, AIAA Journal, 51, 7, 1716-1732.
• 18. Zhao D.M., Zhang Q.C., Tan Y., 2009, Random flutter of a 2-DOF nonlinear airfoil in pitch and plunge with freeplay in pitch, Nonlinear Dynamics, 58, 4, 643-654.
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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).