| |
Analysis
Lift
and drag coefficients are defined as: CL = (2 Lift Force/ rV2A) and CD = (2 Drag Force/ rV2A), where V is the flow velocity, r the
density and A the area of the lifting surface.
For a given section,
plot the lift and drag as a function of wind speed at a given angle of the flow
with respect to the section. Repeat this for other angles. How do lift and
drag vary with angle between the flow and the plane of the selected section?
Is this the same for all wind speeds? Does it depend on the rotational velocity
for the wheels?
How do lift and drag vary with wind speed? Use
Excel to plot your data and fit a trend line through your data. Does any polynomial
fit the data best?
What effect does wheel rotation have on the
data? Compare the spoke wheel and the carbon-fiber
wheel behavior. Compute
the lift and drag coefficients for the wheels. Can you draw any conclusions
about which would be best for a track bike or a road bike? Explain your reasons.
|
|
