Determine the flow rate of air through a labyrinth seal on a 170 mm diameter shaft. The labyrinth consists of 8 fins, height 4.5 mm, pitch 7 mm, radial clearance 0.5 mm and tip width 0.35 mm. The absolute pressures upstream and downstream of the seal are 5 bar and 1.01 bar respectively. The temperature of air upstream of the seal is 280 K. The gas constant is 287 J/kg/K.