Static Aeroelastic Scaling and Analysis of a Sub-Scale Flexible Wing Wind Tunnel Model

This paper presents an approach to the development of a scaled wind tunnel model for static aeroelastic similarity with a full-scale wing model. The full-scale aircraft model is based on the NASA Generic Transport Model (GTM) with flexible wing structures referred to as the Elastically Shaped Aircraft Concept (ESAC). The baseline stiffness of the ESAC wing represents a conventionally stiff wing model. Static aeroelastic scaling is conducted on the stiff wing configuration to develop the wind tunnel model, but additional tailoring is also conducted such that the wind tunnel model achieves a 10% wing tip deflection at the wind tunnel test condition. An aeroelastic scaling procedure and analysis is conducted, and a sub-scale flexible wind tunnel model based on the full-scale's undeformed jig-shape is developed. Optimization of the flexible wind tunnel model's undeflected twist along the span, or pre-twist or wash-out, is then conducted for the design test condition. The resulting wind tunnel model is an aeroelastic model designed for the wind tunnel test condition.

[1]  C. M. Reeves,et al.  Function minimization by conjugate gradients , 1964, Comput. J..

[2]  Nhan T. Nguyen,et al.  Development of Variable Camber Continuous Trailing Edge Flap System , 2012 .

[3]  John C. Houbolt,et al.  Differential equations of motion for combined flapwise bending, chordwise bending, and torsion of twisted nonuniform rotor blades , 1957 .

[4]  Eric Ting,et al.  A Mission-Adaptive Variable Camber Flap Control System to Optimize High Lift and Cruise Lift-to-Drag Ratios of Future N+3 Transport Aircraft , 2013 .

[5]  Nhan Nguyen,et al.  Integrated Flight Dynamic Modeling of Flexible Aircraft with Inertial Force-Propulsion-Aeroelastic Coupling , 2008 .

[6]  Ilhan Tuzcu,et al.  Nonlinear Aeroelasticity of a Flexible Wing Structure Coupled with Aircraft Flight Dynamics , 2012 .

[7]  M. Berger,et al.  Robust and efficient Cartesian mesh generation for component-based geometry , 1998 .

[8]  Nhan Nguyen,et al.  NASA Innovation Fund 2010 Project Elastically Shaped Future Air Vehicle Concept , 2010 .

[9]  Nhan Nguyen,et al.  Coupled Aeroelastic Vortex Lattice Modeling of Flexible Aircraft , 2011 .

[10]  L. R. Miranda,et al.  A generalized vortex lattice method for subsonic and supersonic flow applications , 1977 .

[11]  Moffett Field.  Distributed Parameter Optimal Control by Adjoint Aeroelastic Differential Operators for Mode Suppression Control , 2013 .

[12]  Andrew J. Kurdila,et al.  『Fundamentals of Structural Dynamics』(私の一冊) , 2019, Journal of the Society of Mechanical Engineers.

[13]  Dewey H. Hodges,et al.  Introduction to Structural Dynamics and Aeroelasticity: Contents , 2002 .

[14]  Dewey H. Hodges,et al.  Introduction to Structural Dynamics and Aeroelasticity , 2002 .

[15]  E. Polak,et al.  Note sur la convergence de méthodes de directions conjuguées , 1969 .

[16]  Christine M. Belcastro,et al.  Development of a Dynamically Scaled Generic Transport Model Testbed for Flight Research Experiments , 2004 .

[17]  Garret N. Vanderplaats,et al.  Multidiscipline Design Optimization , 1988 .