Abstract
The characteristics of spatially oscillating jets emanating from various Sweeping Jet Actuators (SJAs) are investigated in the present study by performing numerical analysis. The four different SJA designs commonly referred in the literature for the flow control applications, namely, the feedback free type, single feedback type, sharp dual feedback type and curved dual feedback type are considered for this investigation. The various characteristics of the oscillating jets such as instantaneous velocity field, jet oscillation frequency, spread angle and the mean centerline velocity variation have been evaluated and compared with the aim of finding an effective design for application in flow control. The present study reveals that the oscillation frequency and jet penetration are more for a feedback free SJA when compared to the other designs for the same conditions whereas the spread angle is high for a curved dual feedback SJA. Based on these findings, it is inferred that the feedback free type and curved dual feedback type are more suitable for flow control applications.
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