| Large air funnel cooling tower usually formed by thin elastic hyperbolic shells is an important establishments in thermal power stations. This kind of structure is sensitive to wind loads which is the main dominant load for design. It is necessary to determine the distribution of wind load on the surface and the interference effect between towers, so we can find out the approaches for wind resistance.In this paper, numerical simulation method was employed to study distribution of wind-induced pressure on the single tower as well as airflow interference between double towers. Firstly, current condition of research on CFD was reviewed. The fundamental principles and equations were discussed about the numerical simulation of the wind pressure on the cooling towers. Then, the CFD simulation results of wind load on single tower are obtained and compared with the data of the Codes. The two sets of data agreed well which shows the rationality of CFD method to obtain the wind load on cooling tower. Upon the analysis of wind pressure for the fixed towers' distance under various wind directions, three different regions according to different wind azimuths are classified. The study of interference effect on different towers' distances and azimuths is also carried out. The drag forces of rear tower increase with the wind azimuths and reach maximum at side to side arrangement under fixed towers' distance. When two towers are arranged in tandem, the drag forces of rear tower increase with the towers' distance, and incline to the result of single tower. The towers' distance of 1.1 — 1.4 at side to side arrangement should be avoided due to the worst interference effect.The wind-resistant behaviors of cooling tower under different situation were studied in detail. The ean and dynamic wind load are numerically simulated. The gust load factors under different situation are obtained based on time domain analysis. These results may help to the engineering design and Code refinement of cooling tower.
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