In: Mechanical Engineering
6A)
The aerodynamic drag of a car, Fdrag, is a function of surrounding
air density ρ...
6A)
The aerodynamic drag of a car, Fdrag, is a function of surrounding
air density ρ and viscosity μ, velocity of the car V, and length of
the car L. Using ρ, V, and L as repeating variables, express this
relationship in dimensionless form.
6B)
The aerodynamic drag of a new sports car is to be predicted at a
speed of 100 km/hr at an air temperature of 25°C. Automotive
engineers build a one fifth scale model of the car to test in a
wind tunnel. It is winter, and the wind tunnel is located in an
unheated building; the temperature of the wind tunnel air is only
about 5°C. Determine how fast the engineers should run the wind
tunnel to achieve similarity between the model and the
prototype.
(sorry my teacher not provide diagram)