EXAMPLE 1 The following data are suggested as a basis for the design of a single-sided centrifugal compressor: Power input factor 1.04 Slip factor o 0.9 Rotational speed N 290 rev/s Overall diameter of impeller 0-5 m Eye tip diameter 0-3 m Eye root diameter 0-15 m 9 kg/s 295 K 1-1 bar 0-78 Air mass flow m Inlet stagnation temperature Toi Inlet stagnation pressure Pol Isentropic efficiency ne √₂ = 143 m/s. Requirements are (a) to determine the pressure ratio of the compressor and the power required to drive it assuming that the velocity of the air at the inlet is axial; (b) to calculate the inlet angle of the impeller vanes at the root and tip radii of the eye, assuming that the axial inlet velocity is constant across the eye annulus; and (c) to estimate the axial depth of the impeller channels at the periphery of the impeller.