EXPERIMENTAL INVESTIGATION OF A DOUBLE CIRCULAR ARC CASCADE WITH 73° CAMBER

A double circular arc (DCA) cascade with 73° camber has been tested, and accordingto the test results its critical Mach number, optimum incidence, deviation angle,pressure distributions on airfoil surfaces,pressure losses and incidence angle range are analysed. This cascade is also compared with a supercritical airfoil cascade.The results indicate that the DCA cascades with such large camber still can achieve good aerodynamic performances(large turning,high velocity,low loss and wide incidence angle range)and coincide well with the general princples of DCA cascades provided that the cascade parameters are chosen correctly and distribution of passage area is reasonable.