INVESTIGATIONS OF TIP VORTICES WITH THE TRIPLE HOT-WIRE ANEMOMETRY

With the triple hot-wire technique, an experimental investigation in t he three-dimensional wake of a CLARK Y wing were carried out. The vort ical flow field, generated by a plain rectangular wing with mounted ti p caps, and the influence of three different shaped winglet configurat ions on the near wake and the behaviour of the tip vortex roll-up has been studied. The time-averaged profiles of the velocity components ha ve been evaluated as well as double and triple products of the fluctua tions. The center of the main vortices and the vorticities in plains n ormal to the main flow direction are determined. The results may be us ed as initial and boundary conditions for numerical investigation and their validation.