Three-dimensional flow in deep rotating stall cells of an axial compressor

The results of measurements of the three-dimensional flowfield within a single-stage compressor operating in deep rotating stall are presented in this paper. A technique employing a triple hot-wire probe has been used for the measurements. The obtained results provide a detailed description of the flow in rotating stall cells. The structure of the cells is described by using fundamental fluid flow concepts. Radial organization of the cells, interaction with the unstalled flow, and stalling of a rotor blade passage are discussed on the basis of the results. The generality of the present observations is discussed by comparing them with the results of other investigations. (Author)