Using synthetic jets to emulate rectangular tab-style vortex generators*

Vortex generators are a predominant flow control strategy for aircraft due to reliability and efficient function. However, there are instances where you do not necessarily need the vortex structure (e.g., an aircraft in cruise) and thus it becomes parasitic. We explore a common active flow control actuator, the synthetic jet, as being capable of directly replacing a vortex generator. We compare the vortex structure and resultant vorticity fields produced by synthetic jets and rectangular tab-style vortex generators. These vortex generators produce a strong, coherent wall-bounded vortex core that develops downstream. Synthetic jet parameters such as orifice orientation, orifice size, and blowing ratio are tuned to best mimic the vortex structure. The resulting flow fields will be analysed for potential performance benefits. Dimensional analysis will be performed to create a predictive model for vortex size and strength for both the synthetic jets and for the vortex generators. Ultimately, our aim is to provide guidance on the best configuration of a synthetic jet for completely replacing a single tab-style vortex generator.