The aerodynamic characteristics of airfoils operating at Re = 4 × 103 were examined, varying the parameters related to the airfoil shape such as thickness, camber, and roughness. Airfoils with good aerodynamic performance at this Re have the following shape characteristics: (1) they are thinner than airfoils for higher Re numbers, (2) they have a sharp leading edge, and (3) they have a camber of about five percent with its maximum camber at about mid-chord. The characteristics of airfoils are strongly affected by leading edge vortices. The measured two-dimensional airfoil characteristics indicate that the planform, which greatly affects the flight performance of the three-dimensional wing at high Reynolds numbers, has little effect on the flight performance at this Reynolds number.

Issue Section:
Research Papers
Topics:
Airfoils, Reynolds number, Flight, Shapes, Chords (Trusses), Diluents, Surface roughness, Vortices, Wings
1.
Abbott, I. H., and Doenhoff, A. E. V., 1958, Theory of Wing Sections, Dover, New York.
2.
Alexander, R. McN., 1982, “Size, Shape and Structure for Running and Flight,” in A Comparison to Animal Physiology, Taylor, C. R., Johansen, K. and Bolis, L., eds., Cambridge: Cambridge University Press, pp. 309–324.
3.
Anderson, Jr. J. D., 1991, “Fundamentals of Aerodynamics,” McGraw-Hill, New York.
4.
Azuma, A., 1992, “The Biokinetics of Flying and Swimming,” Springer-Verlag, Tokyo.
5.
Fage
A.
, and
Johansen
F. C.
,
1927
, “
On the Flow of Air Behind an Inclined Flat Plate of Infinite Span
,”
Proceedings of The Royal Society
, London, England, Series A, Vol.
116
, pp.
170
–
197
.
6.
Fage
A.
, and
Johansen
F. C.
,
1928
, “
The Structure of the Vortex Sheet
,”
Philosophical Magazine
, Series 7, Vol.
5
, pp.
417
–
441
.
7.
Gad-el-Hak
M.
,
1990
, “
Control of Low-Speed Airfoil Aerodynamics
,”
AIAA Journal
, Vol.
28
, No.
9
, pp.
1537
–
1552
.
8.
Havelock
T. H.
,
1923
, “
Studies in Wave Resistance: Influence of the Form of the Water-Plane Section of the Ship
,”
Proceedings of The Royal Society
, London, England, Series A, Vol.
103
, pp.
571
–
585
.
9.
Hoerner, S. F., 1965, Fluid-Dynamic Drag, Published by the Author.
10.
Jacobs, E. N., and Sherman, A., 1937, “Airfoil Section Characteristics as Affected by Variations of the Reynolds Number,” NACA.TR-586.
11.
Johnson, W., 1980, Helicopter Theory, Princeton University Press, Princeton, NJ.
12.
Kubo, Y., Shimoyama, I., and Miura, H., 1993, “Study of Insect-Based Flying Microrobots,” IEEE International Conference on Robotics and Automation.
13.
McMasters, J. H., and Henderson, M. L., 1979, “Low-Speed Single-Element Airfoil Synthesis,” NASA CP-2085.1-31.
14.
Miyagi
T.
,
1964
, “
Ossen Flow Past a Flat Plate Inclined to the Uniform Stream
,”
Journal of the Physical Society of Japan
, Vol.
19
, No.
6
, pp.
1063
–
1073
.
15.
Perkins, C. D., and Hage, R. E., 1965, Airplane Performance Stability and Control, John Wiley & Sons, Inc., New York.
16.
Rees
C. J. C.
,
1975
, “
Aerodynamics Properties of an Insect Wing Section and a Smooth Aerofoil Compared
,”
Nature
, Vol.
258
, pp.
141
–
142
.
17.
Schmitz, F. W., 1967, “Aerodynamics of the Model Airplane. Part 1. Airfoil Measurements,” NACA-TM-X-60976.
18.
Vogel
S.
,
1967
, “
Flight in Drosophila. III. Aerodynamic Characteristics of Fly Wings and Wing Models
,”
Journal of Experimental Biology
, Vol.
46
, pp.
431
–
443
.
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