A low-speed wind-tunnel investigation is presented detailing the effects of vortex generators on an airfoil at low Reynolds numbers (80,000 and 160,000). Six different static vortex generator layouts were tested. In addition, an oscillatory (or active) vortex generator was designed and tested. Force balance measurements were recorded and interpreted with the aid of surface flow visualization. The data suggest that the static vortex generators function similarly to those at higher Reynolds numbers; increasing the maximum lift coefficient and increasing the stall angle. Different static vortex generator configurations appear preferable at the two tested Reynolds number ranges. The oscillating vortex generator did not appear effective in its present configuration.
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Seshagiri et al. (2009) studied this question.
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