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| Simulation on wind-proof effect of wind wall based on CFD |
| LI Jiale1,2,3, ZHAO Wenju1*, YAN Zheng1 |
| 1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050; 2. College of Civil Enginee-ring, Tianjin University, Tianjin 300072, China; 3. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China |
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Abstract According to the windproof effect of Wtype wind wall, threedimensional steadystate simulation was carried out based on CFD for the nearsurface winds of 3 m and 5 m in 5 m/s and 13 m/s two different wind speeds respectively. The results show that when the airflow passes through the wind wall, the position speed below the wall is greatly reduced, but the position above the wall height begins to accelerate, and there is obvious zoning action. When the wind speed is 5m/s, with the increase of flow length, the wind speed of the 3 m wind wall increases from 0 in the triangle trend，the wind speed residual coefficient near the surface at 12m is 0.91-0.98 and doesn′t exceed 1.5 m high windshield wind speed increases gradually in rectangular trend from 0. In the range of h<3.1 m and L<6.0 m，nearsurface wind speed residual coefficient of 5 m wind wall is 2.02%-93.40% of 3 m wind wall, and in the range of h<3.1 m and L>6.0 m，nearsurface wind speed residual coefficient is 7460%-8940% of 3m wind wall, the windproof effect is obvious. When the wind speed is 13 m/s, the zoning effect is more obvious. In the range of h<3.1 m and L<6.0 m，the nearsurface wind speed residual coefficient of 5 m wind wall is 5.2%-43.5% of the 3 m wind wall. and in the range of h<3.1 m and L>6.0 m，the nearsurface wind speed residual coefficient is 4.8%-73.3% of the 3 m wind wall.
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Received: 19 June 2018
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