Along the lines of the present paper the aerodynamic performance of
the low-fuel-consumption vehicle TERA Fennek was investigated
experimentally as well as numerically. The wind tunnel
measurements, which were carried out with a model on a scale 1:2
for varying incident flow angles provided a comprehensive data base
for a validation of the computational results. For the numerical
simulation the SST-k-omega turbulence model was chosen for all
considered incident flow angles aplha. For zero and the maximum
considered flow angle of 25, respectively, a Detached Eddy
Simulation (DES) was carried out as well in order to assess the
predictive capabilities of this unsteady hybrid, computationally
much more expensive, approach as compared to the steady
Reynolds-Averaged Navier-Stokes equations (RANS) concept of
SST-k-omega. Despite the inaccuracies of the numerical predictions
particularly observed for high incident flow angles, the numerical
flow simulations were proven to serve as a powerful tool to analyse
the aerodynamically performance of a tested geometry in more detail
than experiments can do.
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