The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Flow Behavior and Performance Characteristics of Constant Air Volume Fan According to Different Hub Shape

허브 형상에 따른 정풍량 환기팬의 유동과 성능특성

  • 이호호 (고려대학교 대학원.한국과학기술연구원) ;
  • 최항철 (한국과학기술연구원 도시에너지시스템연구단) ;
  • 정재구 ((주)힘펠) ;
  • 이윤표 (한국과학기술연구원 도시에너지시스템연구단) ;
  • 신유환 (한국과학기술연구원 도시에너지시스템연구단) ;
  • 정진택 (고려대학교 기계공학부)
  • Received : 2011.10.31
  • Accepted : 2012.01.17
  • Published : 2012.04.01
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Abstract

The constant air volume flow fan can maintain constant flow rate to the wide range of exit pressure. Therefore, the use of this fan is increasing recently for ventilation of high building. Brushless DC motor is adopted to this fan because that has advantages of compactness and performance. But this type of motor protrude from impeller hub side to fan inlet. The Impeller inlet flow is influenced by size of this obstacle called hub. In this paper, the influence of hub shape on the fan performance characteristics are experimentally and numerically analyzed. CFX 12.0 is used to perform the fan internal flow analysis and numerical results are compared with the experiments. Depending on hub shape, internal loss is generated and the performance and efficiency are reduced. The best performance is occurred around $h/b_1$ = 0.25. The results of this study will be contribute to initial design of constant air volume flow fan development.

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References

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