Edge matching for unsteady design of turbomachinery (I) Theory and implementation

The edge matching (EM) concerns the spatial relation between a blade trailing edge and the leading edge of the sequent blade row. EM theory and its implementation methods was presented. While EM theory is described first. Two methods of implementing EM, namely spanwise integration and full optimization, are described. Theoretical analysis indicates that EM may improve the aerodynamic, aeroelastic, aeroacoustic and heat transfer performances of turbomachinery by matching phase angles of unsteady flow along the whole span. EM provides a new degree of freedom for turbomachinery design.