Aerodynamic characteristic study for unmanned air vehicles (UAVS) FX63-I37
Unmanned Air Vehicles are getting a great deal of attention from the research perspective recently. tTnm-ed Air Vehicles (UAVs) are catching more and more attention for their applications in civilian and military fields. The relatively low speed and the small aspect ratio of wings of these vehicles...
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| Format: | Thesis |
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2013
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| Online Access: | http://eprints.uthm.edu.my/5848/ http://eprints.uthm.edu.my/5848/1/MAGEDI_MOH._M._SAAD.pdf |
| Summary: | Unmanned Air Vehicles are getting a great deal of attention from the research
perspective recently. tTnm-ed Air Vehicles (UAVs) are catching more and more
attention for their applications in civilian and military fields. The relatively low
speed and the small aspect ratio of wings of these vehicles cause a particular flow
regime that is still not well understood. Since the theories on the aerodynamics of
low Reynolds number flows are yet to mature and wind tunnel experiments cost long
periods and great costs, the mathematical simulation based on computational fluid
dynamics (CFD) is st good methodology to adopt. Flow characteristic could be
visualized on airfoil using commercial software ANSYS. Reynolds Navier-Stokes
(RANS) been used to investigate the characteristics of pneumatic airfoil at different
angles of attack. However, CFD typically has difficulty in predicting the location and
size of the laminar separation bubble which in turn may result in poor quantitative
predictions for lift, drag, and moment. Because of the problems inherent in modeling
layers thicker border, where the flow may transition from laminar to turbulent flows
at low Reynolds number are not well understood may lead to poor aerodynamic
prediction in the results. While CFD methods have been validated for a quantity of
airfoils, reliance solely on computational results is ill-advised at this point. The
classic FX 63-137 was chosen for its superior low Reynolds number characteristics.
It has been publicized to produce a maximum lift coefficient higher than 1.5, whereas
conventional airfoils are known to degrade well below this level at low Reynolds
numbers. |
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