scholarly journals Visualization of flow field around a Micro Air Vehicle with mechanical flapper

2007 ◽  
Vol 27 (Supplement1) ◽  
pp. 83-84
Author(s):  
Hiroyuki OGUSU ◽  
Mizuki NAKAMURA ◽  
Masayoshi FUKAWA ◽  
Akiyoshi IIDA
Keyword(s):  
Flow Field ◽  
Micro Air Vehicle ◽  
Air Vehicle

Influence of propeller slipstream on vortex flow field over a typical micro air vehicle

2016 ◽  
Vol 121 (1235) ◽  
pp. 95-113 ◽  
Author(s):  
S. Sudhakar ◽  
A. Chandankumar ◽  
L. Venkatakrishnan
Keyword(s):  
Flow Field ◽  
Vortex Flow ◽  
Surface Flow ◽  
Micro Air Vehicle ◽  
Stereoscopic Particle Image Velocimetry ◽  
Flow Visualisation ◽  
Flow Topology ◽  
Freestream Velocity ◽  
Air Vehicle ◽  
Oil Flow

ABSTRACTAn experimental study has been carried out to explore the effect of propeller-induced slipstream on the vortex flow field on a fixed-wing Micro Air Vehicle (MAV). Experiments were conducted at a freestream velocity of 10 m/s, corresponding to a Reynolds number based on a root chord of about 1.6 × 105. Surface flow topology on the surface of the MAV wing at propeller-off and propeller-on conditions was captured using surface oil flow visualisation at four angles of incidence. The mean off-body flow over the MAV was documented in the four spanwise planes at different chord position using Stereoscopic Particle Image Velocimetry (SPIV) technique at angle-of-attack of 24° for both conditions. The oil flow visualisation showed minimal differences in flow patterns for propeller-off and propeller-on conditions at 10° and 15° incidence. The small asymmetry between port and starboard side observed at 20° during the propeller-off condition became significantly pronounced at 24°. The fuselage stub which is necessary for housing the motor of the propeller was seen to have a significant effect on the flow symmetry at large incidences that can occur when the MAV encounters sudden vertical gusts. Switching on the propeller restored the symmetry at both incidences. SPIV measurements were carried out at the incidence of 24° which exhibited the highest asymmetry. The off-body data shows the re-establishment of symmetry during propeller-on condition owing to the increase in the magnitude of spanwise and vertical velocities as a result of the propeller slipstream. The findings emphasise the importance of considering the propeller flow and design of the motor housing while evaluating the aerodynamics of low-aspect-ratio MAVs.

Flow field studies on a micro-air-vehicle-scale cycloidal rotor in forward flight

2014 ◽  
Vol 55 (12) ◽  
Author(s):  
Andrew H. Lind ◽  
Tejaswi Jarugumilli ◽  
Moble Benedict ◽  
Vinod K. Lakshminarayan ◽  
Anya R. Jones ◽  
...  
Keyword(s):  
Flow Field ◽  
Field Studies ◽  
Micro Air Vehicle ◽  
Forward Flight ◽  
Air Vehicle

scholarly journals Flow Visualization around a Flapping-Wing Micro Air Vehicle in Free Flight Using Large-Scale PIV

Aerospace ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 99 ◽  
Author(s):  
Alejandro del Estal Herrero ◽  
Mustafa Percin ◽  
Matej Karasek ◽  
Bas van Oudheusden
Keyword(s):  
Flow Field ◽  
Large Scale ◽  
Light Sheet ◽  
Flapping Wing ◽  
Micro Air Vehicle ◽  
Flapping Wings ◽  
Free Flight ◽  
True Nature ◽  
Flight Direction ◽  
Air Vehicle

Flow visualizations have been performed on a free flying, flapping-wing micro air vehicle (MAV), using a large-scale particle image velocimetry (PIV) approach. The PIV method involves the use of helium-filled soap bubbles (HFSB) as tracer particles. HFSB scatter light with much higher intensity than regular seeding particles, comparable to that reflected off the flexible flapping wings. This enables flow field visualization to be achieved close to the flapping wings, in contrast to previous PIV experiments with regular seeding. Unlike previous tethered wind tunnel measurements, in which the vehicle is fixed relative to the measurement setup, the MAV is now flown through the measurement area. In this way, the experiment captures the flow field of the MAV in free flight, allowing the true nature of the flow representative of actual flight to be appreciated. Measurements were performed for two different orientations of the light sheet with respect to the flight direction. In the first configuration, the light sheet is parallel to the flight direction, and visualizes a streamwise plane that intersects the MAV wings at a specific spanwise position. In the second configuration, the illumination plane is normal to the flight direction, and visualizes the flow as the MAV passes through the light sheet.

Design and Fabrication of an SU-8 Biomimetic Flapping-wing Micro Air Vehicle by MEMS Technology

ROBOT ◽  
2011 ◽  
Vol 33 (3) ◽  
pp. 366-370 ◽  
Author(s):  
Pengcheng CHI ◽  
Weiping ZHANG ◽  
Wenyuan CHEN ◽  
Hongyi LI ◽  
Kun MENG ◽  
...  
Keyword(s):  
Flapping Wing ◽  
Micro Air Vehicle ◽  
Air Vehicle ◽  
Mems Technology
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