Ground effect on tandem flapping wings hovering

2017 ◽  
Vol 152 ◽  
pp. 40-56 ◽  
Author(s):  
N.G. Srinidhi ◽  
S. Vengadesan
Keyword(s):  
Ground Effect ◽  
Flapping Wings ◽  
Tandem Flapping Wings

scholarly journals Collective Flow Enhancement by Tandem Flapping Wings

2015 ◽  
Vol 115 (18) ◽  
Author(s):  
Nick Gravish ◽  
Jacob M. Peters ◽  
Stacey A. Combes ◽  
Robert J. Wood
Keyword(s):  
Flapping Wings ◽  
Collective Flow ◽  
Flow Enhancement ◽  
Tandem Flapping Wings

Bio-inspired design of flapping-wing micro air vehicles

2005 ◽  
Vol 109 (1098) ◽  
pp. 385-393 ◽  
Author(s):  
K. D. Jones ◽  
C. J. Bradshaw ◽  
J. Papadopoulos ◽  
M. F. Platzer
Keyword(s):  
Aspect Ratio ◽  
Figure Of Merit ◽  
Ground Effect ◽  
Micro Air Vehicles ◽  
Flapping Wing ◽  
Flapping Wings ◽  
Rechargeable Battery ◽  
Flight Testing ◽  
Low Aspect Ratio ◽  
Air Vehicles

AbstractIn this paper the development and flight testing of flapping-wing propelled, radio-controlled micro air vehicles are described. The unconventional vehicles consist of a low aspect ratio fixed-wing with a trailing pair of higher aspect ratio flapping wings which flap in counterphase. The symmetric flapping-wing pair provides a mechanically and aerodynamically balanced platform, increases efficiency by emulating flight in ground effect, and suppresses stall over the main wing by entraining flow. The models weigh as little as 11g, with a 23cm span and 18cm length and will fly for about 20 minutes on a rechargeable battery. Stable flight at speeds between 2 and 5ms–1has been demonstrated, and the models are essentially stall-proof while under power. The static-thrust figure of merit for the device is 60% higher than propellers with a similar scale and disk loading.

On the Propulsive Performance of Tandem Flapping Wings with a Modified Immersed Boundary Method

2016 ◽  
Vol 13 (05) ◽  
pp. 1650025 ◽  
Author(s):  
Dingyi Pan ◽  
Jian Deng ◽  
Xueming Shao ◽  
Zubin Liu
Keyword(s):  
Immersed Boundary Method ◽  
Thrust Force ◽  
Wake Flow ◽  
Flapping Wings ◽  
Immersed Boundary ◽  
Phase Lag ◽  
Boundary Method ◽  
Total Thrust ◽  
Tandem Flapping Wings ◽  
The One

The modified immersed boundary method is introduced and applied to study the propulsive mechanism of a tandem flapping wings system. The effects of tandem wings distance and phase lag between the two flapping wings are investigated. Thrust force of the upstream wing is nearly constant and close to the magnitude of single flapping wing system. Thrust force of second wing is influenced by the distance and phase lag. With specific parameters, the second wing can obtain a maximum thrust which is larger than the one of first wing. The flow structures of the wake flow are classified into three different formations, and they are correlated to the trends of thrust force. The effects of distance and phase lag are coupled other than isolated. It is possible to lower down the power consumption of this tandem flapping wings system and enhance the total thrust force of the system at the same time.

scholarly journals Aerodynamic Model for Tandem Flapping Wings

AIAA Journal ◽  
2016 ◽  
Vol 54 (12) ◽  
pp. 3849-3858
Author(s):  
A. H. M. Faisal ◽  
A. Filippone
Keyword(s):  
Flapping Wings ◽  
Aerodynamic Model ◽  
Tandem Flapping Wings

The effect of phase angle and wing spacing on tandem flapping wings

2012 ◽  
Vol 28 (6) ◽  
pp. 1557-1571 ◽  
Author(s):  
Timothy M. Broering ◽  
Yong-Sheng Lian
Keyword(s):  
Phase Angle ◽  
Flapping Wings ◽  
Tandem Flapping Wings
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