Three-Dimensional Navier-Stokes Analysis of the Flow through A Multiblade Centrifugal Fan

원심다익송풍기 유동의 삼차원 Navier-Stakes 해석

  • 서성진 (인하대학원 기계공학과) ;
  • 첸시 (인하대학교 기계공학과) ;
  • 김광용 (인하대학교 기계공학과) ;
  • 강신형 (서울대학교 기계공학과)
  • Published : 1998.12.01

Abstract

Numerical study is presented for the analysis of three-dimensional incompressible turbulent flows in multiblade centrifugal fan. Reynolds-averaged Navier-Stokes equations with standard k - $\epsilon$ turbulence model are transformed to non-orthogonal curvilinear coordinates, and are discretized with finite volume approximations. Linear Upwind Differencing Scheme(LUDS) is used to approximate the convection terms in the governing equations. SIMPLEC algorithm is used as a velocity-pressure correction procedure. The computational area is divided into three blocks; core, impeller and scroll, which are linked by multi-block method. The flow inside of the fan is regarded as steady flow, and mathematical formula established from the cascade theory and empirical coefficient are employed to simulate tile flow through the impeller. From comparisons between the computational results and the experimental data, the validity of the mathematical formula for the blade forces was examined and good results were obtained qualitatively. Hence, we can get the flow characteristics of multi-blade centrifugal fan and it will be a corner stone of the development of the multiblade centrifugal fan.

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