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Effect of the shape of flapping airfoils on aerodynamic forces

. 2024 Apr 30 ; 10 (8) : e29561. [epub] 20240415

Status PubMed-not-MEDLINE Language English Country Great Britain, England Media electronic-ecollection

Document type Journal Article

Links

PubMed 38665583
PubMed Central PMC11043941
DOI 10.1016/j.heliyon.2024.e29561
PII: S2405-8440(24)05592-0
Knihovny.cz E-resources

The rapid exhaustion of fossil fuels and the ozone depletion caused by the excessive usage of the fossil fuels has prompted researchers to look towards bioinspired designs for both propulsion and energy extraction purposes. Limited amount of work has been done to present the effects of airfoil shape on the aerodynamic forces on flapping foils. In this paper, we examine in detail the effect of airfoil camber and its position on flapping foil performance in both energy extraction and propulsion regimes. We also examine the effect of reflex camber on flapping foil performance in both flow regimes. In total, 42 airfoils are analyzed using the NACA 4 and 5-series cross-sections. The man objective of this research is to identify a trend, between airfoil shape and aerodynamic forces. The database created as a result will be used in the future work for designing a hydrokinetic turbine and a bio-inspired unmanned aerial vehicle. The results from the numerical simulations indicate that the airfoil shape has significant effects on the time averaged drag force on the airfoil in both flow regimes. However, the time averaged lift force remains negligible for all cases.

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