Rotating Wing Aeroelasticity with Camber-wise Deformable Airfoils

Students :

Sponsor :

Smith Thepvongs, Devesh Kumar [Profile]

Vertical Lift Rotorcraft Center of Excellence (VLRCOE)/U.S. Army

Summary:

Develop framework of aeroelastic model of rotating wings with camber-wise deformable airfoils for enhance performance and vibration characteristics associated with rotorcraft.

 

For the power enhancement and vibration reduction, various active control strategies have been developed, including actively controlled flap (AFC) and active twist rotor (ATR) blades. Here introduced a novel way in this field of actively control blade, the camber-wise deformable airfoils. An aeroelastic analysis for rotors with integrated active materials and deforming cross-sections was recently developed with low and high fidelity model. In spite of merits of the high fidelity model, it is computationally expensive. Thus, using the low fidelity model, the preliminary capabilities of active camber will be shown to improve noise, vibration and power consumption. Highly non-linear rich design space of this framework will be explored by introducing the optimization capability. This low-fidelity model with optimization capability will give a valuable guideline for high fidelity model.

 

Principal objectives of this project are:

  • Show capability and effectiveness of active camber with low fidelity model

  • System identification for surrogate model

  • Explore the design space to guide the high fidelity model

1

 

Finite Section modes: camber-wise deflection

 

 

2

 

Low fidelity framework of active camber blades

 

 

3

 

Two step optimization process

Step 1: Surrogate optimization based on assumed range of parameters

Step 2: Gradient-based optimization using fmincon (in MATLAB) with surrogate optimization minima as starting points

3

 

Optimized camber deformation for F4Z vibration load reduction (units: %c)