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Assessment of Numerical Optimization Algorithms in Design of Low-Noise Axial-Flow Fan

축류송풍기의 저소음 설계에서 수치최적화기법들의 평가

  • 최재호 (인하대학교 대학원 기계공학과) ;
  • 김광용 (인하대학교 기계항공자동화공학부)
  • Published : 2000.10.01

Abstract

Three-dimensional flow analysis and numerical optimization methods are presented for the design of an axial-flow fan. Steady, incompressible, three-dimensional Reynolds-averaged Navier-Stokes equations are used as governing equations, and standard k- ${\varepsilon}$ turbulence model is chosen as a turbulence model. Governing equations are discretized using finite volume method. Steepest descent method, conjugate gradient method and BFGS method are compared to determine the searching directions. Golden section method and quadratic fit-sectioning method are tested for one dimensional search. Objective function is defined as a ratio of generation rate of the turbulent kinetic energy to pressure head. Two variables concerning sweep angle distribution are selected as the design variables. Performance of the final fan designed by the optimization was tested experimentally.

Keywords

References

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