MEC3102

Question 1 (30 marks)The aerodynamic drag of a new sports car is to be predicted at a speed of 75 km/h 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 […]

Q1: The space between two 15 cm long concentric cylinders is filled with glycerine (viscosity 0.5 N.s/m2), figure 1. The inner cylinder has a radius R = 7 cm and the gap width between the cylinders a =b= 0.25 cm, Determine the torque and the power required to rotate the inner cylinder at ω=180 rev/min.