Patent ID: 7047167
Filing Date: 2006-05-16
Classification: F01D,G06F,Y02T

Abstract:
1. A computer-implemented method for designing a shape of a blade having operational stability while optimizing a plurality of objective functions including incidence toughness that indicates operation stability of the blade and at least one of a trailing-edge deviation angle, a pressure loss coefficient, a maximum slope of blade surface Mach number for pressure distribution, a lift/drag ratio, and a blade load, the method comprising the steps for: performing an optimization analysis on the plurality of objective functions according to Pareto optimization approach; selecting Pareto solutions from the optimization analysis for optimal relationship between the objective functions; and determining the incidence toughness from first and second evaluation values of a parameter at first and second incident angles whose signs are, respectively, opposite to each other about an incident angle with respect to a design point on the blade.