b Using RTT for energy balance find the kineticenergy t Gro

b Using RTT for energy balance, find the kinetic-energy t Gro up problem (one problem to be submitted per project team): Flow around a truck is being examined in a wind tu Velocity at the i be divided into several rectangular sections of areas for these (imaginary) areas in cm2 are shown below. n a wind tunnel containing a test section of size 0.6 m x 0.6 m (cross section) x 1.2 m (length nlet section is nearly uniform at 60 m/s. At the outlet, the cross section was imagined to measurement purposes. Cross-sectional areas c 225.00 112.50 112.50 112.50 112.50 225.00 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 56.25 112.50 56.25 56.25 56.25 56.25 112.50 225.00 225.00 56.25 112.50 112.50 112.50 56.25 112.50 112.50 112.50

Solution

A)From the above figure cross sectional area of the truck A is 3.375m *2.25 =7.58m square .

Taking density of air ro = 1.225kg/m cube.

Now the uniform velocity = 60 m/sec

coefficient of drag =?

Now the drag force acting on the truck is= (coefficient of drag*Cross sectional Area*Density*Velocity)/2

C)Kinetic energy coefficient is not needed as the velocity is uniform.