Investigating the Power Extraction of Applying Hybrid Pitching Motion on a Wing with Leading and Trailing Flaps

초록

This research utilized a hybrid trajectory on a wing incorporating a dual flap with the goal of enhancing performance. The hybrid profiles initiate with a non-sinusoidal pattern during the interval 0.0 <= t/T <= 0.25, evolving toward a sinusoidal pattern within the range 0.25 < t/T <= 0.5. Similarly, the hybrid motion follows a non-sinusoidal pattern in the range 0.5 < t/T <= 0.75, before shifting back to a sinusoidal pattern within the range 0.75 < t/T <= 1.0. The effectiveness of using a hybrid trajectory on a wing with leading and trailing flaps in enhancing the energy harvesting performance is examined through numerical simulations. The results demonstrate that hybrid trajectories applied to a two-flap wing configuration outperform a single flat plate and a wing with leading and trailing flaps both operating under a sinusoidal trajectory. The wing length spans from 45% to 55%, with the leading flap length ranging from 25% to 35%. The trailing flap lengths adjust accordingly to ensure the combined total matches the flat plate's full length, which is 100%. The wing pitch angle was fixed at 85 degrees while the leading flap's pitch angle varied between 40 degrees and 55 degrees and the pitch angle of the trailing flap ranged from 0 degrees to 20 degrees. The findings reveal that utilizing hybrid motion on a wing fitted with leading and trailing flaps notably improves power output in comparison to configurations with either one plate or three plates. The power output is achieved at particular dimensions: a leading flap length of 30%, a wing length of 55%, and a trailing flap length of 15%. The corresponding pitch angles are 50 degrees for the leading flap, 85 degrees for the wing, and 10 degrees for the trailing flap. The aforementioned configuration results in a 34.06% increase in output power in comparison to one plate. The maximum efficiency for this setup reaches 44.21%. This underscores the superior performance of hybrid trajectories over sinusoidal trajectories in enhancing energy extraction performance.

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