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Experimental bifurcation analysis of a wing profile

Research output: Contribution to conferencePaper

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Experimental bifurcation analysis of a wing profile. / Tartaruga, Irene; Barton, David A W; Rezgui, Djamel; Neild, Simon A.

2019. Paper presented at International Forum on Aeroelasticity and Structural Dynamics , Savannah, United States.

Research output: Contribution to conferencePaper

Harvard

Tartaruga, I, Barton, DAW, Rezgui, D & Neild, SA 2019, 'Experimental bifurcation analysis of a wing profile' Paper presented at International Forum on Aeroelasticity and Structural Dynamics , Savannah, United States, 10/06/19 - 13/06/19, .

APA

Tartaruga, I., Barton, D. A. W., Rezgui, D., & Neild, S. A. (2019). Experimental bifurcation analysis of a wing profile. Paper presented at International Forum on Aeroelasticity and Structural Dynamics , Savannah, United States.

Vancouver

Tartaruga I, Barton DAW, Rezgui D, Neild SA. Experimental bifurcation analysis of a wing profile. 2019. Paper presented at International Forum on Aeroelasticity and Structural Dynamics , Savannah, United States.

Author

Tartaruga, Irene ; Barton, David A W ; Rezgui, Djamel ; Neild, Simon A. / Experimental bifurcation analysis of a wing profile. Paper presented at International Forum on Aeroelasticity and Structural Dynamics , Savannah, United States.9 p.

Bibtex

@conference{6774dc9950b64e51ba30f06207581973,
title = "Experimental bifurcation analysis of a wing profile",
abstract = "The prediction of flutter instabilities is very critical in aeroelstic wing design, as it limits the aircraft operational envelope. Aeroelastic structures that have nonlinear characteristics, as in highly flexible wings, can exhibit limit cycle oscillations in the vicinity of the flutter boundary. However, comprehensive characterization of these nonlinear oscillations can be challenging without a well established nonlinear mathematical or numerical model. In the present paper,control-based continuation (CBC) technique is used to characterize the nonlinear oscillatory dynamics of a physical aeroelastic system undergoing pre and post flutter oscillations, without the use of a mathematical model. The aeroelastic system was represented by a two-dimensional wing with pitch and heave degrees of freedom, tested in the low turbulence wind tunnel of the University of Bristol. The aim of this research is to demonstrate the capability of the CBC technique to trace unstable periodic behavior through stabilizing unstable limit cycle oscillations. The results allowed to produce a full bifurcation diagram for a fluttering wing profile, despite the noisy turbulent flow environment of the wind tunnel.",
keywords = "Flutter, limit cycle oscillations, LCOs, Experimental bifurcation analysis, Control-based continuation",
author = "Irene Tartaruga and Barton, {David A W} and Djamel Rezgui and Neild, {Simon A}",
year = "2019",
month = "9",
day = "13",
language = "English",
note = "International Forum on Aeroelasticity and Structural Dynamics : IFASD 2019, IFASD 2019 ; Conference date: 10-06-2019 Through 13-06-2019",
url = "http://ifasd2019.utcdayton.com/",

}

RIS - suitable for import to EndNote

TY - CONF

T1 - Experimental bifurcation analysis of a wing profile

AU - Tartaruga, Irene

AU - Barton, David A W

AU - Rezgui, Djamel

AU - Neild, Simon A

PY - 2019/9/13

Y1 - 2019/9/13

N2 - The prediction of flutter instabilities is very critical in aeroelstic wing design, as it limits the aircraft operational envelope. Aeroelastic structures that have nonlinear characteristics, as in highly flexible wings, can exhibit limit cycle oscillations in the vicinity of the flutter boundary. However, comprehensive characterization of these nonlinear oscillations can be challenging without a well established nonlinear mathematical or numerical model. In the present paper,control-based continuation (CBC) technique is used to characterize the nonlinear oscillatory dynamics of a physical aeroelastic system undergoing pre and post flutter oscillations, without the use of a mathematical model. The aeroelastic system was represented by a two-dimensional wing with pitch and heave degrees of freedom, tested in the low turbulence wind tunnel of the University of Bristol. The aim of this research is to demonstrate the capability of the CBC technique to trace unstable periodic behavior through stabilizing unstable limit cycle oscillations. The results allowed to produce a full bifurcation diagram for a fluttering wing profile, despite the noisy turbulent flow environment of the wind tunnel.

AB - The prediction of flutter instabilities is very critical in aeroelstic wing design, as it limits the aircraft operational envelope. Aeroelastic structures that have nonlinear characteristics, as in highly flexible wings, can exhibit limit cycle oscillations in the vicinity of the flutter boundary. However, comprehensive characterization of these nonlinear oscillations can be challenging without a well established nonlinear mathematical or numerical model. In the present paper,control-based continuation (CBC) technique is used to characterize the nonlinear oscillatory dynamics of a physical aeroelastic system undergoing pre and post flutter oscillations, without the use of a mathematical model. The aeroelastic system was represented by a two-dimensional wing with pitch and heave degrees of freedom, tested in the low turbulence wind tunnel of the University of Bristol. The aim of this research is to demonstrate the capability of the CBC technique to trace unstable periodic behavior through stabilizing unstable limit cycle oscillations. The results allowed to produce a full bifurcation diagram for a fluttering wing profile, despite the noisy turbulent flow environment of the wind tunnel.

KW - Flutter

KW - limit cycle oscillations

KW - LCOs

KW - Experimental bifurcation analysis

KW - Control-based continuation

M3 - Paper

ER -