33th Congress of the International Council of the Aeronautical Sciences

03.1 - Aerodynamics – CFD Methods and Validation

ENHANCING CFD PREDICTIONS FOR THE GRIPEN AIRCRAFT

P. Eliasson¹, P. Weinerfelt¹, F. Bramkamp, NSC, Sweden; ¹Saab, Sweden

We demonstrate the advantages we obtain with a fully implicit solution technique of the Navier-Stokes equations on unstructured grids. We show comparative results for several test cases with focus on large scale on the Gripen calculations leading to more than a factor of three reduction in computing time. In many cases we also get improved steady state convergence leading to improved accuracy.


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