Incidence and Deviation-Angle Correlations for Compressor Cascades

An analysis is presented for the variation of low-speed, minimum-loss, incidence angle and deviation angle for compressor-cascade blades. The aerodynamics governing the behavior of these angles is discussed, and the principal influencing parameters are established. A single general relation is obtained for predicting these angles for conventional sections such as the British C-series blades, the double circular-arc blade, and the NACA 65-series blades when the latter blade sections are expressed in terms of an equivalent circular-arc chamber line. The specific constants associated with each blade shape are derived from the available data.