RT Journal Article
ID 14cf860450643a41
A1 Tian, Ruijun 
A1 Mitchell, Robert 
A1 Martin-Alarcon, Leonardo 
A1 Shu, Fangjun
T1 EXPERIMENTAL INVESTIGATION OF 2D FLEXIBLE PLUNGING HYDROFOIL
JF Journal of Flow Visualization and Image Processing
JO JFV
YR 2013
FD 2014-12-15
VO 20
IS 4
SP 243
OP 260
K1 flapping flight
K1 wing flexibility
K1 thrust force
K1 PIV
AB It has long been hypothesized that the flight of birds and insects greatly benefits from the flexibility and morphing facility of their wings. A significant advantage that flapping flexible wing models have over quasi-steady rigid wing models was a much higher lift generation capability. Both experimental and computational studies have shown that the leading edge vortex (LEV) plays an important role in this higher lift generation. In this study, we further explore the internal mechanisms behind the production of these high lift forces. Two NACA0012 miniature wings, one flexible and one rigid, were actively plunged at various frequencies in a viscous glycerol-water solution. Two-dimensional, phase-locked particle image velocimetry (PIV) measurements were conducted to investigate the evolution of vortices. Simultaneous measurements of lift and thrust forces were taken during plunging to reveal the relationship between the force generation and the surrounding flow field. Results from the flexible hydrofoil were compared directly to results from the rigid one to reveal the influence of flexibility. These results can be used to benchmark future computational work.
PB Begell House
LK https://www.dl.begellhouse.com/journals/52b74bd3689ab10b,61a50b703817a2b8,14cf860450643a41.html