Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Some Relations Between the Geometric Parameters and Internal Flow Field Characteristics in Multiblade Fan/Scroll System

다익 홴/스크롤 시스템의 형상변수와 내부 유동장 특성과의 관계

  • 맹주성 (한양대학교 기계공학부) ;
  • 유달현 (한양대학교 대학원 기계공학부) ;
  • 이광호 (한양대학교 대학원 기계공학부) ;
  • 박인규 ((주)만도)
  • Published : 2000.09.01
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Abstract

This paper describes that the size of inactive zone can be directly applied to design multiblade fan/scroll system. From the experimental studies using a five hole pitot tube and smoke test, it is found that the size of inactive zone has linear relations with the mean velocity of impeller inlet and cut-off angle gives a great influences to the fan efficiency. For the practical design, a function related with geometric parameters(i.e. inner radius, cord length, cut-off clearance and cut-off angle) of fan/scroll system is suggested. By using these formulas, the size and distribution of inactive zone can be predicted without the measurements through the full domain, it can be possible to use them to know the efficiency improvement for new model designed.

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References

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