In this experimental work, a detailed analysis of the wind tunnel measurements on
scaled motorbike models equipped with different front wings was performed
considering four wing configurations operating at different Reynolds numbers and
roll angles. Global forces acting on the models were measured by a
high-resolution dynamometric balance, while velocity fields in the wake were
measured by means of the Particle Image Velocimetry technique. Throughout the
paper, overall models’ performances are investigated, demonstrating similar
behavior for drag coefficients and various trends for lift coefficients. The
without- and single-wing configurations were shown to have positive sign, and
conversely, the double- and closed-wing cases—with negative sign—generated
downforce due to the presence of significant upward velocities, which in turn
modified the wake shape. Furthermore, the improvements in closed-wing
configuration compared to without- and single-wing ones were noticeable, while
slight enhancements were observed for the double-wing case.
It is evidenced how PIV technique can be used to advance the wing design by
capturing the wake velocity and circulation. The proposed simple geometrical
configurations are feasible at low costs and with easy manufacturing.