Industrial Application

To test the sensors on industrial test-cases the generic 3D delta wing VFE-2 and the 3D airfoil SFB^01 were simulated. The delta wing VFE-2 shows a separa­tion of a primary vortex on the leading edge with a reattchment on the wing, which leads to a separation and reattchment of a secondary vortex. On the left-hand side in the figure 28 the critical points of separation and reattachment are shown (red), which presents the separation of the primary vortex on the leading edge and the vor­tex near the trailing edge very well. The separation of the secondary vortex and the

Fig. 26 RAE 2822 case9 — the errors in the expansion ratio and the wall distance leads to differences in the prediction of the friction coefficient Cf, in case of the mixed error both errors annul each other

Fig. 27 RAE 2822 case9 — the friction coefficient cf Corr corrected by the error function implemented in TAU, the differences are clearly reduced reattachment of the primary and secondary vortex are not identified. Both are identi­fiable in the output of the qualitative variable sep for separation structure visualisa­tion in the same figure on the right-hand side. In figure 29 a detailed illustration of the critical points of separation with the output variable crit_sep are shown, with the separation of the primary vortex on the leading edge (left) and same small vor­tices near the trailing edge (right). The sensors for the inclination and the expansion ratio are applied on the test-case SFB-401. The results are shown in figure 30.