초록 ▼

An initial set of individuals having design parameters of a blade as a gene, is determined at random (S12). Next, an analysis using Navier-Stokes equations is performed. On the basis of the analysis result, ranking (evaluation) of respective individuals are performed using a pressure loss coefficien

An initial set of individuals having design parameters of a blade as a gene, is determined at random (S12). Next, an analysis using Navier-Stokes equations is performed. On the basis of the analysis result, ranking (evaluation) of respective individuals are performed using a pressure loss coefficient, a trailing edge deviation angle and the like as objective functions (S14). When a shape of a blade having a desirable performance is obtained, or when a predetermined number of generations is achieved, the analysis is terminated assuming that a termination condition has been met (S22). When the termination condition has not been met, processes about individual selection, crossing between individuals and mutation are performed so that generation is incremented by 1. The above processes are repeated, so that Pareto solutions can be obtained according to MOGA in consideration of a trade-off relationship between the objective functions.

대표청구항 ▼

What is claimed is: 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

What is claimed is: 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. 2. The computer-implemented method according to claim 1, wherein the absolute values of the first and second incident angles are 10째 or less. 3. A computer-implemented program stored on computer-readable medium for designing a shape of a blade having operational stability while optimizing a plurality of objective functions when executed on a computer to: execute a step where 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 or pressure distribution, a lift/drag ratio, and a blade load are a set of the plurality of objective functions; perform optimization analysis according to Pareto optimization approach on the plurality of objective functions so that Pareto solutions are obtained that optimize a relationship between the plurality of objective functions; and 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. 4. The computer-implemented program according to claim 3, wherein the absolute values of the first and second incident angles are 10째 or less.