the resultant force due to both pressure forces and wall shear forces acting on an ellipsoidal-shaped body is measured to be 700 n, with the force acting at a 35o angle to the direction of flow, as sketched.
The fluid is air at 21 oC, the pressure is one standard atmosphere, the freestream velocity is 55.0 m/s, and characteristic area of the body is 0.5110 m2. (use this area for calculation of both drag and lift coefficients.).
a. Determine the drag and the lift forces acting on the body
b. Calculate the drag coefficient and lift coefficient
c. Suppose a 1/4th-scare model is tasted in a wind tunnel using the same air. How fast should the wind tunnel be run? Do you notice any problem with this? Explain. Any suggestion about what do about this problem?