Three-Dimensional Wing Flutter Analysis

1943 ◽  
Vol 10 (2) ◽  
pp. 41-47 ◽  
Author(s):  
ALEXANDER H. FLAX
Keyword(s):  
Three Dimensional ◽  
Wing Flutter ◽  
Flutter Analysis

scholarly journals Three dimensional flutter analysis and wind-tunnel experiments of slender webs in cross flow

2017 ◽  
Vol 83 (852) ◽  
pp. 17-00025-17-00025 ◽  
Author(s):  
Keiichi HIROAKI ◽  
Nobuhito KAWAI ◽  
Masahiro WATANABE
Keyword(s):  
Wind Tunnel ◽  
Three Dimensional ◽  
Cross Flow ◽  
Wind Tunnel Experiments ◽  
Flutter Analysis

Three-Dimensional Viscous Flutter Analysis of Standard Configuration 10

2007 ◽  
Author(s):  
Paul J. Petrie-Repar ◽  
Andrew McGhee ◽  
Peter A. Jacobs
Keyword(s):  
Unsteady Flow ◽  
Three Dimensional ◽  
Design Flow ◽  
Suction Surface ◽  
Corner Separation ◽  
Aerodynamic Damping ◽  
Flutter Analysis ◽  
Standard Configuration ◽  
Phase Angles ◽  
2D And 3D

The results of a three-dimensional (3D) viscous flutter analysis for a compressor stage, Standard Configuration 10, are presented. The unsteady flow simulations were performed by a 3D linearized Navier-Stokes flow solver using the Spalart and Allmaras turbulence model. Significant flow blockage due to corner separation at the hub on the suction surface was predicted by the steady-state 3D viscous simulation at a design condition. Corner separation was not predicted by 3D inviscid or two-dimensional (2D) viscous simulations. The corner separation was found to have a destabilizing effect and changed the nature of the unsteady flow. In fact, the 3D viscous simulations predicted negative aerodynamic damping for almost half of the inter-blade phase angles, while the 2D and 3D inviscid simulations predicted stable positive aerodynamic damping for all inter-blade phase angles. An off-design flow condition was also examined and significant differences between the 2D and 3D viscous simulations were found.

Aerodynamic Forces of Stay Cables Incorporating in Flutier Analysis

2013 ◽  
Vol 438-439 ◽  
pp. 894-900
Author(s):  
Ke Jian Ouyang ◽  
Yi Long ◽  
Bi Cao Peng
Keyword(s):  
Aerodynamic Force ◽  
Three Dimensional ◽  
Wind Tunnel Test ◽  
Test Results ◽  
Stay Cable ◽  
Aerodynamic Forces ◽  
Stay Cables ◽  
Stiffness Matrices ◽  
Flutter Analysis ◽  
Sutong Bridge

With the length of stay cables close to 580m, only inclusion in aerodynamic forces of main deck cannot reflect the actual situation during wind-resistant design. The aerodynamic forces of stay cables should be considered in the three-dimensional flutter analysis of cable-stayed bridges. In this paper, mathematic expressions of unsteady aerodynamic force of stay cable were then derived in terms of aerodynamic damping and stiffness matrices. The above procedure is implemented into NACS by an independent module. As an example, the multimode flutter analysis of Sutong Bridge was conducted by using NACS. Fair agreement is achieved between the present numerical simulation and wind tunnel test results.

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