Maximization of the lift coefficient of airfoils equipped with active flow control devices |
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Authors: | R A Gaifutdinov |
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Institution: | 1.N. Chebotarev Research Institute of Mathematics and Mechanics,Kazan State University,Kazan,Russia |
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Abstract: | We state and solve an optimization problem of finding a shape of airfoils with a separation-free flow about them that are
characterized by the external flow part extraction and propulsive jet ejection to achieve the maximum lift coefficient. An
approach to this problem solution is based on the theory of inverse boundary-value problems of aerohydrodynamics. The initial
problem with limitations is reduced by the penalty function method to a problem of unconditional optimization, the solution
of which is obtained by the conjugate gradient method. The examples of constructing such airfoils with a separation-free flow
about them are presented and the conclusions are made that it is rational to use the flow control devices to increase the
lift coefficient. The results of numerical calculations are compared with data obtained in the Fluent CFD software. |
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