Computational Fluid Dynamic Study on the Effect of Winglet Addition in Flapping Hydrofoils to Evaluate the Propulsive Performance of Wave Gliders

Mouliswar, R R; Chandrasekaran, Karthik; Ranganathan, T. N.; Thondiyath, Asokan

doi:10.1109/oceanschennai45887.2022.9775423

Cited by 1 publication

(1 citation statement)

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“…Some of the recent studies providing future research prospects are discussed as follows. In a computational fluid dynamics study [19], the effects of incorporating winglets into flapping hydrofoils and their impact on wave glider propulsive performance were investigated. Simulation results indicated the addition of winglets reduced tip vortices, improved propulsion efficiency, and enhanced the thrust coefficient.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Vortex Structures Generated by a Rigid Flapping Wing with a Winglet in Quiescent Water

Srikanth Goli,

Arnab Roy,

Subhransu Roy

et al. 2024

Proc. eng. technol. innov.

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This study aims to the utilization of vortex structures generated through wing flapping for achieving sustainable flight, and the motivation is elicited by the phenomenon observed in natural flyers. The vortex structures in the flow field generated by a flapping rigid wing are captured using vorticity and the LAMDA2 criterion. The study investigates a comparative analysis between a wing both with and without a winglet. Moreover, the influence of flapping frequency is examined as well. For the experiments, particle image velocimetry (PIV) measurements are employed for the flow field around mechanical flapping motion in a quiescent water condition. The flapping mechanism has one-degree freedom, showing a 1:3 ratio in motion, and tested wings at 1.5 and 2.0 Hz. A “modified” vortex filamentation and fragmentation phenomenon is proposed as a significant finding in the present study, based on a comprehensive analysis of the flow field around the wing with a winglet.

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Section: Introductionmentioning

confidence: 99%