This research investigates the effects of the Strouhal number and phase difference on the performance of bioinspired tandem flapping foils, which mimic the propulsion mechanisms of fish and birds. The study focuses on optimizing these parameters to enhance thrust generation and efficiency in low-speed Autonomous Surface Vehicles (ASVs) and Autonomous Underwater Vehicles (AUVs). Experimental and computational analyses reveal that specific combinations of Strouhal numbers and phase differences result in constructive interference, improving propulsion efficiency. The findings contribute to the development of energy-efficient propulsion systems for unmanned aquatic vehicles. This work advances bioinspired engineering by providing insights into the dynamics of tandem flapping foils under various operational conditions.
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