Discussion: “The Simulation of Axial Compressor Performance Using an Annulus Wall Boundary Layer Theory” (Balsa, T. F., and Mellor, G. L., 1975, ASME J. Eng. Power, 97, pp. 305–317)

Abstract

caused by a flow from high pressure to low pressure. This nonzero vertical velocity or "blowing" results in an increase in the momentum thicknesses just ahead of the row, in accordance with equations (21a) and (b). The volume flow, Q, is empirically related to the pressure rise, Ap, through the seal coefficient K* (Fig. 3). The additional loss caused by the windage of the shrouds is given by ^V l2) = ^(rpU s C f *L) H (22) where Cf* is a skin friction coefficient characteristic of the flow in the shrouds and L is the wetted length of which C/* acts.