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Keywords
(6)
Fluid Mechanics
Performance Test
Reynolds Number
Wind Tunnel
Wind Tunnel Test
Vertical Axis Wind Turbine
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Aerodynamic characteristics of seven symmetrical airfoil sections through 180degree angle of attack for use in aerodynamic analysis of vertical axis wind turbines
Aerodynamic characteristics of seven symmetrical airfoil sections through 180degree angle of attack for use in aerodynamic analysis of vertical axis
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Aerodynamic characteristics of seven symmetrical airfoil sections through 180degree angle of attack for use in aerodynamic analysis of vertical axis wind turbines
(
Citations: 17
)
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Robert E. Sheldahl
,
P. C. Klimas
When work began on the Darrieus
vertical axis wind turbine
(VAWT) program at Sandia National Laboratories, it was recognized that there was a paucity of symmetrical airfoil data needed to describe the aerodynamics of turbine blades. Curvedbladed Darrieus turbines operate at local Reynolds numbers (Re) and angles of attack (..cap alpha..) seldom encountered in aeronautical applications. This report describes (1) a
wind tunnel test
series conducted at moderate values of Re in which 0 less than or equal to ..cap alpha.. less than or equal to 180Â° force and moment data were obtained for four symmetrical bladecandidate airfoil sections (NACA0009, 0012, 0012H, and 0015), and (2) how an airfoil property synthesizer code can be used to extend the measured properties to arbitrary values of Re (10â´ less than or equal to Re less than or equal to 10â·) and to certain other section profiles (NACA0018, 0021, 0025).
Published in 1981.
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(
www.osti.gov
)
(
prod.sandia.gov
)
Citation Context
(8)
...In the examples, a Reynolds number (Re) of 5 × 10
^{6}
was used, which was consistent with the experiment (Sheldahl and Klimas
1981
) with
U
= 38...
Yuguang Bai
,
et al.
Numerical aerodynamic simulations of a NACA airfoil using CFD with blo...
...To visualize these trends effect on lifttodrag ratio and also compare predicted results with their experimental counterparts available in [
16
], Fig. 1 is presented for NACA 0015 airfoil at Reynolds number of 80000...
Reza Chini
,
et al.
Blades optimization for an ocean current horizontal axis turbine using...
...Figure 2 presents the dependence of CL on a and Rec, along with some published data at Rec = 3.6 9 10 5 and 7.6 9 10 5 measured by
Sheldahl and Klimas (1981 )
a nd...
Y. Zhou
,
et al.
The ultralow Reynolds number airfoil wake
...The experimental values are taken from [
13
], while Newtonian approximated model is described for example in [15]...
...Typical behaviors of the lift and drag coefficients as functions of the angle of attack are shown in Figure 2 obtained from the experimental data presented in [
13
]...
...By using the expressions (3) and the lift and drag coefficients in [
13
] the regions depicted in Figure 3 for different values of � have been obtained...
...By using the value of ¯ α� computed from the coefficients in [
13
], the system’s parameters in [10] as the minimum velocity at which the lift force is still able to counteract a fraction of the gravity force, i.e...
...¯ α� ≈ 0.2 rad for the airfoil considered in [
13
]) and, in turn, cos α ≈ 1 and sin α ≈ α, we rewrite (29) as...
Roberto Naldi
,
et al.
On robust transition maneuvers for a class of tailsitter vehicles
...The experimental values are taken from [
13
], while Newtonian approximated model is described for example in [14]...
Roberto Naldi
,
et al.
Minimum time trajectories for a class of V/STOL aircrafts
References
(3)
Theory of Wing Sections
(
Citations: 254
)
Von Doenhoff
,
E Albert
LowSpeed Wind Tunnel Testing
(
Citations: 163
)
W. H. Rae
,
A. Pope
Published in 1984.
Turbulent Airfoils for General Aviation
(
Citations: 3
)
Richard Eppler
Journal:
Journal of Aircraft  J AIRCRAFT
, vol. 15, no. 2, pp. 9399, 1978
Sort by:
Citations
(17)
Numerical aerodynamic simulations of a NACA airfoil using CFD with blockiterative coupling and turbulence modelling
Yuguang Bai
,
Dongke Sun
,
Jiahao Lin
,
David Kennedy
,
Fred Williams
Journal:
International Journal of Computational Fluid Dynamics  INT J COMPUT FLUID DYNAMICS
, vol. 26, no. 2, pp. 119132, 2012
Study on improvement in aerodynamic performance of Vertical Axis Wind Turbine using Gurney flap
Zhang Xu
,
Qian Wang
,
Geng Dai
,
Hongfei Tan
,
Yingjie Zhong
Conference:
International Conference on Mechanic Automation and Control Engineering  MACE
, 2011
Blades optimization for an ocean current horizontal axis turbine using response surface methodology
Reza Chini
,
Martin Ordonez
,
Ralf Bachmayer
Conference:
OCEANS  Europe  EUROPE
, 2011
The ultralow Reynolds number airfoil wake
(
Citations: 4
)
Y. Zhou
,
H. X. Yang
,
H. Guo
,
J. Mi
Journal:
Experiments in Fluids  EXP FLUID
, vol. 48, no. 1, pp. 81103, 2010
Tracking control with adaption of kites
Jorn H. Baayen
,
Wubbo J. Ockels
Published in 2010.