Abstract
To explore a higher efficiency and lower noise operating condition of adjustable axial-flow fans, a three-dimensional (3D) numerical model is established to study the inside flow field distribution characteristics. Thus, it is indispensable extremely to study the flow field distribution characteristics inside axial-flow fans. In this study, the adjustable blade is installed at seven different angles \(\Delta \beta = 0^\circ , \pm 4^\circ , \pm 8^\circ , \pm 12^\circ\) to investigate the effects on the static pressure distribution in an adjustable blade axial-flow fan. The numerical results manifested that with the increase of the installation angle, the high-pressure region of the intermediate flow surface remains unchanged, but that of the top flow surface is movable. The average static pressure of the radial flow surface increases from the blade bottom to top, and the growth rate increases sharply at the highest 30% of blade. This study can provide guidance for the variable angle operation of axial-flow fans and lay a theoretical foundation for the further study of the evolution rules of aerodynamic noise under different blade angles.
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Wang, L., Wang, K., Wang, N., He, S., Shi, Y., Gao, M. (2020). 3D Numerical Simulation on Flow Field Characteristic Inside the Large-Scale Adjustable Blade Axial-Flow Fan. In: Wang, Z., Zhu, Y., Wang, F., Wang, P., Shen, C., Liu, J. (eds) Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019). ISHVAC 2019. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-9524-6_42
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DOI: https://doi.org/10.1007/978-981-13-9524-6_42
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