pressors, " Centrifugal Compressors—Technical Progress, vol. 3, SAE,

The author reviews several of the better-known theories for predicting slip factor. In the development of such theories it is necessary to idealize the flow pattern by neglecting many of the factors present in a real machine. These include such items as viscosity-induced velocity profiles in both the blade-to-blade and hub-to-shroud directions, secondary flow, separation, flow reversal, meridional plane curvature effects, and leakage through the blade-to-shroud clearance gap. It is only reasonable to expect at least some of these to affect slip factor significantly. Wislicenus [ l l] 3 has analyzed a rotor discharge flow in which the meridional velocity distribution is sinusoidal from hub-to-shroud. Stepanoff [12] has also treated nonuniform velocity in the meridional plane, considering a linear variation from hub-to-shroud. In both cases it has been shown that the slip factor for such a nonuniform distribution is less than wrould be expected i