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허브 형상에 따른 정풍량 환기팬의 유동과 성능특성Flow Behavior and Performance Characteristics of Constant Air Volume Fan According to Different Hub Shape
- Other Titles
- Flow Behavior and Performance Characteristics of Constant Air Volume Fan According to Different Hub Shape
- Issue Date
- 2012
- Publisher
- 한국유체기계학회
- Keywords
- Constant air volume flow fan(정풍량 팬); Flow behavior(유체거동); Hub shape(허브형상); Performance test(성능실험); Numerical analysis(전산해석); Efficiency(효율)
- Citation
- 한국유체기계학회 논문집, v.15, no.2, pp.57 - 62
- Indexed
- KCI
- Journal Title
- 한국유체기계학회 논문집
- Volume
- 15
- Number
- 2
- Start Page
- 57
- End Page
- 62
- ISSN
- 2287-9706
- 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/b1 = 0.25. The results of this study will be contribute to initial design of constant air volume flow fan development.
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