An improved methodology for airfoil shape optimization using surrogate based design optimization

D. Rajaram, R. S. Pant

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

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 languageEnglish
Title of host publicationEngineering Optimization IV - Proceedings of the 4th International Conference on Engineering Optimization, ENGOPT 2014
PublisherCRC Press/Balkema
Pages149-152
Number of pages4
ISBN (Electronic)9781138027251
Publication statusPublished - 01-01-2014
Externally publishedYes
Event4th International Conference on Engineering Optimization, ENGOPT 2014 - Lisbon, Portugal
Duration: 08-09-201411-09-2014

Conference

Conference4th International Conference on Engineering Optimization, ENGOPT 2014
CountryPortugal
CityLisbon
Period08-09-1411-09-14

Fingerprint

Shape Optimization
Shape optimization
Airfoil
Airfoils
Drag
Methodology
Optimization Techniques
Lift drag ratio
Latin Hypercube Sampling
Cambers
Program Analysis
Kriging
Control Points
Global optimization
Angle of attack
Chord or secant line
B-spline
Aerodynamics
Open Source
Splines

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computer Science Applications
  • Control and Optimization

Cite this

Rajaram, D., & Pant, R. S. (2014). An improved methodology for airfoil shape optimization using surrogate based design optimization. In Engineering Optimization IV - Proceedings of the 4th International Conference on Engineering Optimization, ENGOPT 2014 (pp. 149-152). CRC Press/Balkema.
Rajaram, D. ; Pant, R. S. / An improved methodology for airfoil shape optimization using surrogate based design optimization. Engineering Optimization IV - Proceedings of the 4th International Conference on Engineering Optimization, ENGOPT 2014. CRC Press/Balkema, 2014. pp. 149-152
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Rajaram, D & Pant, RS 2014, An improved methodology for airfoil shape optimization using surrogate based design optimization. in Engineering Optimization IV - Proceedings of the 4th International Conference on Engineering Optimization, ENGOPT 2014. CRC Press/Balkema, pp. 149-152, 4th International Conference on Engineering Optimization, ENGOPT 2014, Lisbon, Portugal, 08-09-14.

An improved methodology for airfoil shape optimization using surrogate based design optimization. / Rajaram, D.; Pant, R. S.

Engineering Optimization IV - Proceedings of the 4th International Conference on Engineering Optimization, ENGOPT 2014. CRC Press/Balkema, 2014. p. 149-152.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Rajaram D, Pant RS. An improved methodology for airfoil shape optimization using surrogate based design optimization. In Engineering Optimization IV - Proceedings of the 4th International Conference on Engineering Optimization, ENGOPT 2014. CRC Press/Balkema. 2014. p. 149-152