Optimization of Active/Passive Flow Control Parameters on Airfoils at Transonic Speeds

To improve aerodynamic performance, the active and passive flow control parameters are optimized in different combinations. The flow is simulated by solving the Navier-Stokes equations and a turbulence model. The active flow control is applied using flow suction or blowing on an airfoil, and its des...

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Bibliographic Details
Published in:Journal of aircraft 2011-01, Vol.48 (1), p.212-219
Main Authors: Pehlivanoglu, Y. Volkan, Yagiz, Bedri
Format: Article
Language:English
Subjects:
Aerodynamics
Applied fluid mechanics
Comparative analysis
Exact sciences and technology
Flow control
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Genetic algorithms
Optimization
Physics
Turbulence models
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Summary:To improve aerodynamic performance, the active and passive flow control parameters are optimized in different combinations. The flow is simulated by solving the Navier-Stokes equations and a turbulence model. The active flow control is applied using flow suction or blowing on an airfoil, and its design variables are set to be the location and the angle of the suction/blowing port and the mass flow coefficient at this port. Airfoil surfaces are parameterized by using Bezier curves to optimize an airfoil shape in a passive way. To validate the computational methodology, successful comparisons have been made with available data. A reel coded genetic algorithm is used in all optimization processes. For the demonstration problems considered herein, the best result is provided by the sequential optimization process, which results in 575.8% increment in aerodynamic performance, 183.76% increment in lift coefficient, and 68% decrease in drag coefficient. [PUBLICATION ABSTRACT]
ISSN:0021-8669
1533-3868
DOI:10.2514/1.C031066