Abstract
This paper presents a detailed experimental investigation concerning the influence of blade loading (incidence) on the three-dimensional flow in an annular compressor cascade. The data are acquired at four incidence angles under low Mach number and low Reynolds number conditions. Experimental techniques include the oil-film visualization on the profile and the endwall surfaces, the laser-sheet visualization of the flow field inside the blade passage, and the measurement by radial-circumferential traverses using a seven-hole probe. The behavior and nature of the three-dimensional flow with severe separations inside the blade passage and at the exit are obtained. The distributions of the total pressure loss, static pressure, velocity and outflow angle are also given. These results are valuable for establishing the physical model of the three-dimensional complex flow in axial compressors and for examining the computational procedures.
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