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