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Limit cycle oscillations of delta wing models in low subsonic flow

Publication ,  Journal Article
Tang, D; Henry, JK; Dowell, EH
Published in: Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
January 1, 1999

A nonlinear, aeroelastic analysis of a low aspect, delta wing modeled as a plate of constant thickness demonstrates that limit cycle oscillations (LCO) of the order of the plate thickness are possible. The structural nonlinearity arises from double bending in both the chordwise and spanwise directions. The present results using a vortex lattice aerodynamic model for a low Mach number flow complement earlier studies for rectangular wing platforms that showed similar qualitative results. The theoretical results for the flutter boundary (beyond which LCO occurs) have been validated by comparison to the experimental data reported by other investigators for low aspect ratio delta wings. Also the limit cycle oscillations found experimentally by previous investigators (but not previously quantified prior to the present work) are consistent with the theoretical results reported here. Reduced order aerodynamic and structural models are used to substantially decrease computational cost with no loss in accuracy. Without the use of reduced order models, calculations of the LCO would be impractical. A wind tunnel model is tested to provide a quantitative experimental correlation with the theoretical results for the LCO response itself.

Duke Scholars

Published In

Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

ISSN

0273-4508

Publication Date

January 1, 1999

Volume

3

Start / End Page

2162 / 2172
 

Citation

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Tang, D., Henry, J. K., & Dowell, E. H. (1999). Limit cycle oscillations of delta wing models in low subsonic flow. Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 3, 2162–2172.
Tang, D., J. K. Henry, and E. H. Dowell. “Limit cycle oscillations of delta wing models in low subsonic flow.” Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 3 (January 1, 1999): 2162–72.
Tang D, Henry JK, Dowell EH. Limit cycle oscillations of delta wing models in low subsonic flow. Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 1999 Jan 1;3:2162–72.
Tang, D., et al. “Limit cycle oscillations of delta wing models in low subsonic flow.” Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, vol. 3, Jan. 1999, pp. 2162–72.
Tang D, Henry JK, Dowell EH. Limit cycle oscillations of delta wing models in low subsonic flow. Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 1999 Jan 1;3:2162–2172.

Published In

Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

ISSN

0273-4508

Publication Date

January 1, 1999

Volume

3

Start / End Page

2162 / 2172