1. Aerodynamic Shape Design Optimization of Winglets
Gianluca Minnella
Yuniesky Rodriguez
Jose Ugas

2. Problem Statement
Design, construction and testing of an optimal winglet configuration.
Dr. George Dulikravich

3. Winglets De-strengthening of tip vortices
Additional positive-traction component
INCREASED FUEL EFFICIENCY

4. Winglets INCREASED PAYLOAD CAPABILITIES
Improved load distribution over wing-span

5. Conceptual design: Blended Winglet Wingtip Fence
Blended Elliptical Winglet

6. Design Procedure Attainment of modified-desired Cp distribution: CFD
Inverse shape design: MGM Fourier Series
Optimization: Particle Swarm Algorithm
Removal of interferences: CFD
Manufacturing: High p-plastics, Metal-Alloy
Testing: Surface p-distribution at varying angles of attack

7. Favorable p-distribution
CFD – surface p-distribution
Theory of Flow Separation – flow separation point will be moved toward Trailing Edge
DESIRED PRESSURE DISTRIBUTION

8. Inverse Shape Design
Airfoil will be designed specifically for chosen flow.
Only Cp data is needed to generate airfoil.

9. Fourier Series Adaptation of MGM
Elastic membrane.
Mass-damper- spring system.
Fourier Adaptation
Faster conversion.
Iterations- until desired pressure distribution is met.

10. Inverse Shape Design Animation

11. Optimization Algorithm
Increase design quality
Minimize time and computer costs
Particle-Swarm
Yi updated from Yi & YS
Xi knows Vi
S = {Xi}
with i=1,2,3…n

12. Particle-Swarm
Yi is compared to its actual performance and set to a better performance. (7.2)
The general best solution is updated to the position with the best performance within the swarm. (7.3)
Now the particles velocity and position are updated separately for each dimension j. (7.4, 7.5)

13. Optimization
Construct a FORTRAN code interconnected to AnSys to obtain OPTIMAL SHAPE

14. Manufacturing 2 Alternatives :
DEEP DRAWN – 2 half shells, Laser Weld, AISI 304
CAST – Metal Alloy, Hi-p plastics
Both alternatives require the commission of molding/casting tools

15. Testing:
Surface Pressure Distribution
Flow Separation Point

16. Timeline

17. Division of Responsibilites
Gianluca
Computational Analysis
Manufacturing
Jose
Inverse Shape Design
Yuniesky
Optimization

18. Conclusion Thanks to winglets, aircrafts will be able to:
Consume less fuel
Extend range capabilities
Reduce takeoff distance
Reduce noise emissions
Increase payload
Increase Aerodynamic efficiency
Increase L/D Ratio
Working with 2-D version of Fourier Adaptation, to follow up with 3-D version.