Abstract
This paper describes a Surrogate Based Design Optimization (SBDO) technique for airfoil shape optimization. The airfoil shape is parameterized in terms of B-Splines whose control points are used as design variables. Constraints are imposed on Maximum Camber and Thickness-to-Chord ratio of the airfoil. Optimum Latin Hypercube sampling is used to evaluate max. Lift/Drag (L/D) ratio for candidate airfoils, using XFOIL, an open-source aerodynamic analysis program. Using Kriging, a surrogate surface is created to obtain an approximate value of L/D for any set of design variables. Efficient global optimization algorithm is used to arrive at the optimum shape of airfoil for maximizing L/D at a specific angle of attack. The methodology resulted in profiles with 20% to 30% higher L/D than two baseline airfoils viz., Wortmann FX74 mod and Selig 1210, with several orders of magnitude lesser calls to XFOIL, as compared to a previous study, using teaching-learning based optimization technique.
Original language | English |
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Title of host publication | Engineering Optimization IV - Proceedings of the 4th International Conference on Engineering Optimization, ENGOPT 2014 |
Publisher | CRC Press/Balkema |
Pages | 149-152 |
Number of pages | 4 |
ISBN (Electronic) | 9781138027251 |
Publication status | Published - 01-01-2014 |
Externally published | Yes |
Event | 4th International Conference on Engineering Optimization, ENGOPT 2014 - Lisbon, Portugal Duration: 08-09-2014 → 11-09-2014 |
Conference
Conference | 4th International Conference on Engineering Optimization, ENGOPT 2014 |
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Country/Territory | Portugal |
City | Lisbon |
Period | 08-09-14 → 11-09-14 |
All Science Journal Classification (ASJC) codes
- Engineering(all)
- Computer Science Applications
- Control and Optimization