The effect of wavy leading edge modifications on NACA 0021 airfoil characteristics

N. Rostamzadeh, R. M. Kelso, B. B. Dally, K. L. Hansen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations


In spite of its mammoth physical size, the Humpback whale's manoeuvrability in hunting has captured the attention of biologists as well as fluid mechanists. It has now been established that the protrusions on the leading edges of the Humpback's pectoral flippers, known as tubercles, account for this baleen species' agility. In the present work, Prandtl's non-linear lifting-line theory was employed to propose a hypothesis that the favourable traits observed in the performance of tubercled lifting bodies are not exclusive to this form of leading edge configuration. Accordingly, a novel alternative to tubercles was introduced and incorporated into the design of four airfoils that underwent wind tunnel force measurement tests in the transitional flow regime. The experimental results demonstrate similar loading characteristics of the newly designed foils in comparison with those with tubercles, suggesting the presence of an analogous flow mechanism.
Original languageEnglish (US)
Title of host publicationProceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012
PublisherAustralasian Fluid Mechanics Society
ISBN (Print)9780646583730
StatePublished - Jan 1 2012
Externally publishedYes


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