A study on the aerodynamic distribution of a large wind turbine system considering wind-sand coupling effect

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (16) : 83-92.

DONG Yifan，KE Shitang，YANG Qing

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Abstract

A large-scale wind turbine system is a typical wind-sensitive structure, and it is prone to extreme load effects under wind and sand conditions.Adhesion of sand particles will also affect the turbulence characteristics of the wind and cause additional impact on the system.Current regulations and literature are lacking on large-scale wind turbine systems.Taking the 5 MW horizontal-axis wind turbine independently developed by Nanjing University of Aeronautics and Astronautics as the object, a modified k-ε turbulence model was used to simulate the flow wind field, and a DPM-defined sand model was added to realize the biphase coupling with the incoming air.Combing typical wind speed and sand particle size in strong and extraordinarily strong dust and dust storms, systematic analysis of three-dimensional flow field characteristics, surface sand distribution, pressure coefficient and load distribution of wind turbine blades and towers under the combined action of wind and sand was performed.Finally, the effect of wind-sand load characteristics on the change of environmental parameters was obtained.The research shows that: compared with wind load, sand load mainly impacts the middle and lower part of the wind turbine tower; after the wind and sand work together, the load effect of large-size sand particles on the bottom of the wind turbine tower is particularly significant.The sand pressure coefficient can reach 0.517; the ratio of sand impact load to wind load can reach up to 22.57%.

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/ large wind turbine system, numerical simulation, wind-sand interaction, movement characteristics, Aerodynamic distribution

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DONG Yifan，KE Shitang，YANG Qing. A study on the aerodynamic distribution of a large wind turbine system considering wind-sand coupling effect[J]. Journal of Vibration and Shock, 2019, 38(16): 83-92

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