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Flow fields with vortex in a small semi-open axial fan

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Abstract

In order to clarify the effect of tip clearance (TC) size on fan performance and the flow field at rotor outlet in a small semi-open axial fan, the experimental investigation was carried out. The tip diameter of test fan rotor was 180mm and test TC sizes were 1mm (TC=1mm) and 4mm (TC=4mm). Fan characteristics tests were carried out for two cases of TC size and three-dimensional velocity fields at rotor outlet were measured using a single slant hot-wire probe at four flow-rate conditions. As a result, it was found that the pressure — flow-rate characteristics curves for two cases showed almost the same tendency. However, the ensemble averaged velocity profiles along radial measurement stations of TC=4mm largely changed compared with that of TC=1mm in cases of small flow-rate condition. From the phase-locked averaging results, it was also found that the vortex existed in the rotor outlet flow field of high flow-rate condition for each TC case. Compared with the vortices for TC=1mm and TC=4mm, the vortex for TC=4mm was stronger than that for TC=1mm.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Saga University, 1 Honjo-machi, Saga, 840-8502, Japan

    Norimasa. Shiomi, Yoichi Kinoue, Toshiaki Setoguchi & Kenji Kaneko

  2. Institute of Mechatronics, Zhejiang Sci-Tech University, Xiasha Higher Educational Zone, Hangzhou, 310018, China

    Ying zi Jin

Authors
  1. Norimasa. Shiomi
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  2. Yoichi Kinoue
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  3. Ying zi Jin
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  4. Toshiaki Setoguchi
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  5. Kenji Kaneko
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Shiomi, N., Kinoue, Y., Jin, Y.z. et al. Flow fields with vortex in a small semi-open axial fan. J. Therm. Sci. 18, 294–300 (2009). https://doi.org/10.1007/s11630-009-0294-z

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  • DOI: https://doi.org/10.1007/s11630-009-0294-z

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