An Experimental Study on the Effect of Vortex-Type Applied to Design an Axial Flow Fan

축류송풍기의 설계시 적용된 와류형식의 영향에 관한 실험적 연구

  • 조수용 (경상대 항공기계공학부(항공기부품연구센터)) ;
  • 최범석 (한국기계연구원 열유체환경연구부) ;
  • 오종학 (충남대학교 기계공학과 대학원)
  • Published : 1999.09.01

Abstract

The flow angle at the inlet and exit of a rotor or stator is an important design parameter involved in the design a fan blade. Flow angles along the radial direction for 3-D stacking are calculated using two kinds of vortex methods, i.e. free vortex method and forced vortex method. The performance test shows that a fan designed by the free vortex method is more efficient than a fan designed by the forced vortex method. As a reference, an imported fan is tested. Even though the straightner of the imported fan is used for the comparison test, the difference of efficiency between the imported fan and the fan designed by the free vortex method is negligible. The noise of the fan designed by the free vortex method is less than that of the imported fan. A bellmouth installed at the fan inlet improved the fan efficiency more than $10\%$.

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