21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-4.6.3

COMPUTATIONAL UNSTEADY AERODYNAMICS IN AEROELASTIC SIMULATION

Prananta B. B., Hounjet M. H. L.*, Hoeijmakers H. W. M.**
Delft University of Technology, The Netherlands; *NAL, The Netherlands; **Univ. of Twente, The Netherlands

Keywords: computational, unsteady aerodynamics, aeroelastic simulation

An affordable unsteady aerodynamics method suitable for three-dimensional aeroelastic simulations is presented. The method solves the unsteady Euler /Thin Layer Navier-Stokes equations on a deforming mesh. The spatial discretization is based on a cell-centered scheme and employs an upwind method using Roe's flux difference splitting (FDS). The temporal integration is carried out efficiently in an implicit manner in which a set of nonlinear equations is solved at each time step using a relaxation method. Further, the method is parallelized using a domain decomposition technique. Discussions concerning the requirements for aeroelastic simulation, the solution method and some applications are presented. The quality of the numerical results and the turn-around time of the method demonstrate the applicability of the current method for routine aeroelastic simulation purposes.

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