The edge-matching theory and methods for the unsteady design of turbomachinery

The Edge-Matching(EM) theory and methods are presented. It indicates that the phase angle effects of the periodic unsteady flow, which can not be taken into account under the frame of steady flow, can be considered by adjusting the relative position of the neighboring edges of the neighboring blade rows. It is shown that the EM may be widely used in improving the aerodynamic, aeroelastic, aeroacoustic and heat transfer performances of turbomachinery. As a design freedom, it makes the unsteady design of turbomachinery realizable and operable.