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Experimental study of a passive control of airfoil lift using bioinspired feather flap
- Source :
- Bioinspiration & Biomimetics. 14:066005
- Publication Year :
- 2019
- Publisher :
- IOP Publishing, 2019.
-
Abstract
- This paper presents a systematic experimental investigation on a passive flow control of a NACA0012 airfoil using real feather flap which is installed on the pressure surface. The focus of the present study is to determine the major role of a real feather flap in the aerodynamic performance of a NACA0012 airfoil at small attack angles (α). The feather flap width w and its installation position xin are varied from 0.27c to 0.8c and from 0.0 to 0.2c, respectively, where xin is measured from the leading edge of the airfoil, and c is the chord length of the airfoil. Detailed Particle Image Velocimetry (PIV) measurements are conducted to understand the origin of the aerodynamic benefits introduced by the feather flap. When mounted on the pressure side, the feather flap is proved to be beneficial to improve the aerodynamic performance of the airfoil at small α (= −4° to 8°). The lift CL and lift-to-drag ratio CL/CD are enhanced by 186% and 72%, respectively, for w = 0.53c, xin = 0.2c at α = 2°. Time-averaged vorticity and streamwise velocity around the flapped airfoil weaken and decrease, respectively, compared with those around the plain airfoil, which are attributed to the increased CL and CL/CD.
- Subjects :
- Airfoil
0209 industrial biotechnology
Leading edge
Materials science
Acoustics
Biophysics
02 engineering and technology
Models, Biological
Biochemistry
Passive control
Birds
020901 industrial engineering & automation
Biomimetics
Animals
Wings, Animal
Computer Simulation
Engineering (miscellaneous)
Lift (soaring)
Equipment Design
Aerodynamics
Feathers
Vorticity
021001 nanoscience & nanotechnology
Biomechanical Phenomena
Particle image velocimetry
Flight, Animal
Feather
visual_art
visual_art.visual_art_medium
Molecular Medicine
0210 nano-technology
Biotechnology
Subjects
Details
- ISSN :
- 17483190
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- Bioinspiration & Biomimetics
- Accession number :
- edsair.doi.dedup.....a1f1d513d2d903050720727e5a9f5127