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Influence of tip end-plate on noise of small axial fan

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Abstract

In this work, tip end-plate is used to improve the noise performance of small axial fans. Both numerical simulations and experimental methods were adopted to study the fluid flow and noise level of axial fans. Four modified models and the prototype are simulated. Influences of tip end-plate on static characteristics, internal flow field and noise of small axial fans are analyzed. The results show that on basis of the prototype, the model with the tip end-plate of 2 mm width and changed length achieved best noise performance. The overall sound pressure level of the model with the tip end-plate of 2 mm width and changed length is 2.4 dB less than that of the prototype at the monitoring point in specified far field. It is found that the mechanism of noise reduction is due to the decrease of vorticity variation on the surface of blades caused by the tip end-plate. Compared with the prototype, the static pressure of the model with the tip end-plate of 2 mm width and changed length at design flow rate decreases by 2 Pa and the efficiency decreases by 0.8%. It is concluded that the method of adding tip end-plate to impeller blades has a positive influence on reducing noise, but it may diminish the static characteristics of small axial fan to some extent.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (No. 51276172), Public Welfare Technology Application Projects of Zhejiang Province (No. 2015C31002), Open Foundation of Zhejiang Provincial Top Key Academic Discipline of Mechanical Engineering and Zhejiang Sci-Tech University Key Laboratory (ZSTUME 01A04), and Zhejiang Province Science and Technology Innovation Team Project (2013TD18).

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Authors and Affiliations

  1. Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, 310018, China

    Hongya Mao, Yanping Wang, Peifeng Lin & Yingzi Jin

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

    Toshiaki Setoguchi

  3. School of Mechanical Engineering, Andong National University, Seongcheon-Dong1375, Gyeongdong-RD, Andong, Gyeongsangnuk-DO, 760-749, Korea

    Heuy Dong Kim

Authors
  1. Hongya Mao
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  2. Yanping Wang
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  3. Peifeng Lin
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  4. Yingzi Jin
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  5. Toshiaki Setoguchi
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  6. Heuy Dong Kim
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Additional information

This work is supported by National Natural Science Foundation of China No. 51276172, and Zhejiang province No. 2015C31002, ZSTUME01A04 and 2013TD18.

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Mao, H., Wang, Y., Lin, P. et al. Influence of tip end-plate on noise of small axial fan. J. Therm. Sci. 26, 30–37 (2017). https://doi.org/10.1007/s11630-017-0906-y

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  • DOI: https://doi.org/10.1007/s11630-017-0906-y

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