Effects of a dynamic trailing-edge flap on the aerodynamic performance and flow structures in hovering flight
Journal of Fluids and Structures, ISSN: 0889-9746, Vol: 58, Page: 49-65
2015
- 83Citations
- 50Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
To examine the effects of wing morphing on unsteady aerodynamics, deformable flapping plates are numerically studied in a low-Reynolds-number flow. Simulations are carried out using an in-house immersed-boundary-method-based direct numerical simulation (DNS) solver. In current work, chord-wise camber is modeled by a hinge connecting two rigid components. The leading portion is driven by a biological hovering motion along a horizontal stroke plane. The hinged trailing-edge flap (TEF) is controlled by a prescribed harmonic deflection motion. The effects of TEF deflection amplitude, deflection phase difference, hinge location, and Reynolds number on the aerodynamic performance and flow structures are investigated. The results show that the unsteady aerodynamic performance of deformable flapping plates is dominated by the TEF deflection phase difference, which directly affects the strength of the leading-edge vortex (LEV) and thus influences the entire vortex shedding process. The overall lift enhancement can reach up to 26% by tailoring the deflection amplitude and deflection phase difference. It is also found that the role of the dynamic TEF played in the flapping flight is consistent over a range of hinge locations and Reynolds numbers. Results from a low aspect-ratio ( AR =2) deformable plate show the same trend as those of 2-D cases despite the effect of the three-dimensionality.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0889974615001954; http://dx.doi.org/10.1016/j.jfluidstructs.2015.08.001; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84943187272&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0889974615001954; https://dx.doi.org/10.1016/j.jfluidstructs.2015.08.001
Elsevier BV
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