Abstract
A periodically and unsteadily separating flow with a separation bubble is excited on a flat plate by periodically changing the opening angle of the ceiling. The passive control device, which consists of two flaps connected to each other by a link mechanism, aimed at suppressing the separation bubble is tested. The control effect is evaluated by measuring the flow field using a direction sensitive probe. The experimental results show that the device is capable to decrease the size of the separating region.
