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The polished wing of an unmanned aerial vehicle can be regarded approximately as a flat plate with a total wing span of 1 5 m
The polished wing of an unmanned aerial vehicle can be regarded approximately
as a flat plate with a total wing span of m and a chord length length in the
streamwise direction of m The vehicle is flying at a constant velocity of
ms
i Calculate the total skin friction drag force on both surfaces of the wing
assuming that the flow in the boundary layer is fully laminar.
ii During testing of the UAV, small bolts on the leading edge of the wing loosen
and the wing leading edge starts vibrating. By how much, if at all, could this
change the skin friction drag force?
For air take the following properties: kinematic viscosity
inm
s
viscosity in
kgm
s
density rho kgm
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