Chapter #9 deals with Fluid Mechanics. Two of the most important
concepts in Fluid Mechanics are Archimedes
Principle and Bernoulli's Equation.
1) Give a DETAILED explanation of Archimedes
Principle and Bernoulli's Equation
2) Come up with your own experiment/demonstration to
show the effect
An airfoil profile to be used on a wind turbine blade is tested
in a wind tunnel. The prototype (full-scale) airfoil section has a
chord length of 2m and moves at 50 m/s relative to the wind, the
wind tunnel model has a chord length of 0.4m. The temperature for
the model test is the same as for prototype operation.
(a) What criterion should be used to obtain dynamic similarity
in the experiment? (Write out the criterion in an equation.)...
Question 4
An interesting topic in fluid mechanics is Bernoulli's equation,
which relates pressures and velocities of a fluid with the density
of rho at different heights, eq. 13.12. It has applications in the
airspace. It can be used to measure flow speed in a pipe with a
device named the Venturi meter (see figure 13.34). If the cross
sections are 21 cm2 and 13 cm2, and the height difference resulted
from the pressure difference is 0.2 m, calculate the...
A potential wind turbine location has an average wind speed of 5
m/s at a height of 10 m.
A) Assuming a standard wind friction coefficient of 1/7, what is
the average wind power per area at the proposed tower height of 80
m?
B) If the proposed turbine has a cut-in speed of 4 m/s and a
furling speed of 20 m/s, how many hours per year is the windmill
not spinning (assuming Rayleigh statistics)?
C) Estimate the yearly...