Evaluation of the Performance of Vortex Generators on the DU 91-W2-250 Profile using Stereoscopic PIV
Clara Marika Velte, Martin Otto Lavér Hansen, Knud Erik Meyer, Peter Fuglsang
Stereoscopic PIV measurements investigating the
effect of Vortex Generators on the lift force near
stall and on glide ratio at best aerodynamic
performance have been carried out in the LM
Glasfiber wind tunnel on a DU 91-W2-250 profile.
Measurements at two Reynolds numbers were
analyzed; Re=0.9·10 6 and 2.4·10 6 . The results show
that one can resolve the longitudinal vortex
structures generated by the devices and that mixing
is created close to the wall, transferring high
momentum fluid into the near wall region. It is also
seen that the vortex generators successfully can
obstruct separation near stall. Full Text
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