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Performance, aeroacoustics and feature extraction of an axial flow fan with abnormal blade angle

Author

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  • Li, Chunxi
  • Lin, Qing
  • Ding, Xueliang
  • Ye, Xuemin

Abstract

The effect of the deviation angle of an abnormal blade Δβ on the performance of an axial fan is investigated using 3D steady simulation. The sound pressure distribution in the time and frequency domains is examined using LES (large eddy simulation) and FW–H (Ffowcs Williams–Hawkings) noise model. The energy features of the sound pressure are extracted using WPD (wavelet packet decomposition) and EMD (empirical mode decomposition). The results show that under the abnormal condition, fan performance is lower than normal value and the noise rises. The main noise sources are concentrated on the leading edge and tip of the suction surface. The aerodynamic noise is generated mainly by low-frequency sound, and the impeller exhibits an obvious broadband sound feature. In the regions outside of the impeller, the wavelet packet energy in the fundamental frequency band under abnormal conditions is much lower than that under the normal condition, and the difference becomes significant with increasing Δβ. The EMD energy features appear as obvious changes in the relative percentages of the intrinsic mode function energies; the energy entropy is closely related to the deviation angle. The characteristics obtained by WPD and EMD provide significant references for detecting the deviation angle in axial flow fans.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:103:y:2016:i:c:p:322-339
    DOI: 10.1016/j.energy.2016.02.147
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    Citations

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    Cited by:

    1. Shafiqur Rehman & Md. Mahbub Alam & Luai M. Alhems & M. Mujahid Rafique, 2018. "Horizontal Axis Wind Turbine Blade Design Methodologies for Efficiency Enhancement—A Review," Energies, MDPI, vol. 11(3), pages 1-34, February.
    2. 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.
    3. 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.
    4. 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).
    5. Lei Zhang & Liang Zhang & Qian Zhang & Kuan Jiang & Yuan Tie & Songling Wang, 2018. "Effects of the Second-Stage of Rotor with Single Abnormal Blade Angle on Rotating Stall of a Two-Stage Variable Pitch Axial Fan," Energies, MDPI, vol. 11(12), pages 1-18, November.
    6. Xuemin Ye & Fuwei Fan & Ruixing Zhang & Chunxi Li, 2019. "Prediction of Performance of a Variable-Pitch Axial Fan with Forward-Skewed Blades," Energies, MDPI, vol. 12(12), pages 1-20, June.
    7. 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).
    8. 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.
    9. 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).
    10. Yonggang Gou & Xiuzhi Shi & Jian Zhou & Xianyang Qiu & Xin Chen, 2017. "Characterization and Effects of the Shock Losses in a Parallel Fan Station in the Underground Mine," Energies, MDPI, vol. 10(6), pages 1-20, June.
    11. Baocheng Zhou & Shaochun Ma & Weiqing Li & Wenzhi Li & Cong Peng, 2023. "Study on the Influence Mechanism of Energy Consumption of Sugarcane Harvester Extractor by Fluid Simulation and Experiment," Agriculture, MDPI, vol. 13(9), pages 1-20, August.

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