- A Multi Stage Axial Flow Air Compressor Delivers A Total Pressure Ratio Of 7 The Stagnation Temperature At Entry Is 27 1 (171.95 KiB) Viewed 36 times
A multi-stage axial flow air compressor delivers a total pressure ratio of 7, the stagnation temperature at entry is 27 °C and the overall isentropic efficiency is 85%. At mean diameter of each stage: the degree of reaction is 50%, the blade speed, U, is 225 m/s, the axial velocity, C₁, is 160 m/s, the absolute air velocity angle entering the rotor, a₁, is 200 and the work done factor, λ, is 0.9, determine (at mean diameter); the rotor blade inlet angle, the polytropic efficiency, p the number of stages required, N the static temperature of the air at entry to the rotor, T₁ V. the rotor inlet relative Mach number, Mirel For air: Specific heat ratio, y = 1.4, gas constant, R = 287 J/kg.K and specific heat at constant pressure, cp = 1005 J/kg.K i. ii. iii. iv. (CO1-12 marks, CO2-6 marks)