Turbomachinery blade optimization by 3-dimentional inverse design method - 1st report, theory and application to pumps

摘要

A 3-dimensional inverse design method for optimizing turbomachinery blades has been developed. Optimal blade shapes for specified optimal flow fields are numerically designed according to the inverse design theory, while 3-dimensional flows inside turbomachinery are numerically analyzed making use of CFD (Computational Fluid Dynamics). The main features of this method are: a) easy control of 3-dimensional flows fields, b) significant high performance attributed to a logical approach, c) applicability of obtained data on optimal blade loading to the design of other similar cases, d) systematic design for the development of a turbomachinery series, and e) easy acquisition of stored digital data on designing know-how. This 1st report discusses the basics of the 3-dimensional inverse method and introduces its effectiveness verified in both numerical and experimental terms in a case where the method was used for the design of blades for a mixed-flow diffuser pump.