Aerodynamic Shape Design Optimization of Winglets Gianluca Minnella Yuniesky Rodriguez Jose Ugas
Jan 05, 2016
Aerodynamic Shape Design Optimization of
WingletsGianluca MinnellaYuniesky RodriguezJose Ugas
Design, construction and testing of an optimal winglet configuration.
Problem Statement
Dr. George Dulikravich
De-strengthening of tip vortices
Additional positive-traction component
INCREASED FUEL EFFICIENCY
Winglets
INCREASED PAYLOAD CAPABILITIES
Improved load distribution over wing-span
Winglets
Wingtip Fence
Conceptual design: Blended Winglet
Blended Elliptical Winglet
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
Design Procedure
CFD – surface p-distribution
Theory of Flow Separation – flow separation point will be moved toward Trailing Edge
◦ DESIRED PRESSURE DISTRIBUTION
Favorable p-distribution
Inverse Shape Design
Airfoil will be designed specifically for chosen flow.
Only Cp data is needed to generate airfoil.
Fourier Series Adaptation of MGM MGMo Elastic membrane.o Mass-damper-spring
system.
Fourier Adaptationo Faster conversion.o Iterations- until
desired pressure distribution is met.
Inverse Shape Design Animation
Optimization Algorithm• Increase design quality
• Minimize time and computer costs Particle-Swarm
Yi updated from Yi & YS
Xi knows
Yi @ Vi
S = {Xi}
with i=1,2,3…n
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)
Construct a FORTRAN code interconnected to AnSys to obtain OPTIMAL SHAPE
Optimization
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
Surface Pressure Distribution
Flow Separation Point
Testing:
Timeline
Gianlucao Computational Analysiso Manufacturing Joseo Inverse Shape Designo Manufacturing Yunieskyo Optimizationo Manufacturing
Division of Responsibilites
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.