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Study on static and dynamic characteristics of an axial fan with abnormal blade under rotating stall conditions

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  • Zhang, Lei
  • He, Ruiyang
  • Wang, Xin
  • Zhang, Qian
  • Wang, Songling

Abstract

Based on Reynolds averaged Navier-Stokes (RANS) equation and Realizable k-ε turbulence model, the influence of abnormal deflection of two adjacent moving blades in an axial fan was discussed numerically. The flow field in the rotor, static and dynamic characteristics of normal blades and four abnormal blades combinations under rotating stall are compared. The results show that the abnormal blades have no effect on the number of stall cells. Compared with the normal blades, in the case of non-stall or stall conditions, the positive deflection blades will increase the surface stress of the blade, and the negative deflection blades can reduce it; deformation distribution also has the same law. The deformation distribution of blades is affected by both aerodynamic and centrifugal loading. However, the stress distribution of the blades is mainly affected by centrifugal loading. By modal analysis, the total deformation distribution of the first to fourth-order vibration modes are obtained. The first to third-order vibration modes show the coupling vibration between the blades and hub, and the fourth order is the blade vibration alone.

Suggested Citation

  • Zhang, Lei & He, Ruiyang & Wang, Xin & Zhang, Qian & Wang, Songling, 2019. "Study on static and dynamic characteristics of an axial fan with abnormal blade under rotating stall conditions," Energy, Elsevier, vol. 170(C), pages 305-325.
    • Handle: RePEc:eee:energy:v:170:y:2019:i:c:p:305-325
    DOI: 10.1016/j.energy.2018.12.125
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    References listed on IDEAS

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    1. Ye, Xuemin & Zhang, Jiankun & Li, Chunxi, 2017. "Effect of blade tip pattern on performance of a twin-stage variable-pitch axial fan," Energy, Elsevier, vol. 126(C), pages 535-563.
    2. Li, Chunxi & Lin, Qing & Ding, Xueliang & Ye, Xuemin, 2016. "Performance, aeroacoustics and feature extraction of an axial flow fan with abnormal blade angle," Energy, Elsevier, vol. 103(C), pages 322-339.
    3. Li, Chunxi & Li, Xinying & Li, Pengmin & Ye, Xuemin, 2014. "Numerical investigation of impeller trimming effect on performance of an axial flow fan," Energy, Elsevier, vol. 75(C), pages 534-548.
    4. Ye, Xuemin & Ding, Xueliang & Zhang, Jiankun & Li, Chunxi, 2017. "Numerical simulation of pressure pulsation and transient flow field in an axial flow fan," Energy, Elsevier, vol. 129(C), pages 185-200.
    5. Ye, Xuemin & Li, Pengmin & Li, Chunxi & Ding, Xueliang, 2015. "Numerical investigation of blade tip grooving effect on performance and dynamics of an axial flow fan," Energy, Elsevier, vol. 82(C), pages 556-569.
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    Cited by:

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    2. Wang, Youhao & Sun, Lihui & Guo, Chang & He, Suoying & Gao, Ming & Xu, Qinghua & Zhang, Qiang, 2023. "Vibration characteristics and strength analysis of two-stage variable-pitch axial-flow fan based on fluid-solid coupling method," Energy, Elsevier, vol. 284(C).
    3. Yaguang Heng & Bo Hu & Qifeng Jiang & Zhengwei Wang & Xiaobing Liu, 2020. "Stall Mode Transformation in the Wide Vaneless Diffuser of Centrifugal Compressors," Energies, MDPI, vol. 13(22), pages 1-14, November.
    4. Wang, Jiahao & Liu, Xiaomin & Tian, Chenye & Xi, Guang, 2023. "Aerodynamic performance improvement and noise control for the multi-blade centrifugal fan by using bio-inspired blades," Energy, Elsevier, vol. 263(PC).
    5. Liu, Xue & Liu, Jian & Wang, Dong & Zhao, Long, 2021. "Experimental and numerical simulation investigations of an axial flow fan performance in high-altitude environments," Energy, Elsevier, vol. 234(C).
    6. Ye, Xuemin & Zheng, Nan & Hu, Jiami & Li, Chunxi & Xue, Zhanpu, 2022. "Numerical investigation of the benefits of serrated Gurney flaps on an axial flow fan," Energy, Elsevier, vol. 252(C).
    7. Wei Yuan & Fengzhong Sun & Ruqing Liu & Xuehong Chen & Ying Li, 2020. "The Effect of Air Parameters on the Evaporation Loss in a Natural Draft Counter-Flow Wet Cooling Tower," Energies, MDPI, vol. 13(23), pages 1-16, November.

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