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[1]Xu Zhengzheng,Gao Yong,Han Yanlong,et al.Wind Gathering Effect of Wind Guide Plate with Different Outlet Heights Based on Wind Tunnel Test[J].Research of Soil and Water Conservation,2023,30(06):284-294,306.[doi:10.13869/j.cnki.rswc.2023.06.022]

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Wind Gathering Effect of Wind Guide Plate with Different Outlet Heights Based on Wind Tunnel Test

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 06 Page number: 284-294,306 Column: Public date: 2023-10-10

Title:: Wind Gathering Effect of Wind Guide Plate with Different Outlet Heights Based on Wind Tunnel Test

Author(s):: Xu Zhengzheng¹, Gao Yong^1,2,3, Han Yanlong^1,2,3, Zhang Chao¹, Tian Xiaoning¹, Wang Peng¹; (1.College of Desert Science and Engineering, Inner Mongolia Agricultural University, Huhhot 010011, China; 2.Hangjin National Positioning Observation and Research Station of Desert Ecosystem, Ordos, Inner Mongolia 017400, China; 3.Inner Mongolia Key Laboratory of Aeolian Physics and Desertification Engineering, Huhhot 010011, China)

Keywords:: combating desertification; wind speed flow field; wind guide plate; wind tunnel test; wind gathering effect

CLC:: S775

DOI:: 10.13869/j.cnki.rswc.2023.06.022

Abstract:: [Objective] The aims of this study are to explore the characteristics and rules of the wind speed flow field under different outlet height wind guide plates, clarify its wind gathering effect, and then to provide theoretical support for the configuration mode of wind guide plates. [Method] By means of wind tunnel simulation, the flow characteristics of the wind guide plate with different air outlet heights were measured under different wind direction angles, and the relative wind speed at 1/2 air outlet height was analyzed. The wind speed 〔V_(x)〕 at each point at 1/2 the height of the air vent of the wind guide plate was modeled by multiple regression by selecting the angle between the wind direction(β), the height of the air vent(h), the incoming wind speed(V₀), and the horizontal distance from the wind guide plate(x). [Results](1)Under the condition of wind angle, the wind guide plates all formed a certain range of strong wind zone and growth zone, but its flow field characteristics were different under different air outlet height and wind direction angle. When β was 90°, the influence range of the growing zone and the strong wind zone of the h=3 cm and h=5 cm wind guide plate were the largest. When β was 60°, the influence range of the growth zone and the strong wind zone formed by the h=9 cm wind guide plate was the largest. When β was 45° and β was 30°, the influence range of h=9 cm wind guide plate increasing zone and gathering flow accelerating zone were the largest.(2)When β was 90° and β was 60°, the relative wind speed at 1/2 outlet height of each wind guide plate changed with horizontal distance approximately in the shape of ‘N'. Due to the narrow pipe effect, most of them could reach the peak value of relative wind speed at 0.5 H(H stands for model height), and then the air flow spread and dropped to the lowest value of relative wind speed at 2 H. As the angle between windward decreased, the vertical wind direction projection area of the wind guide plate decreased sharply, and the transit air collected behind the wind guide plate. At this time, the airflow of the horizontal measuring point after 1 H had a strong acceleration effect.(3)The wind speed prediction model of the wind guide plate at the height of 1/2 air outlet was V_(x)=-0.144+0.145h+(-0.022)β+0.808V₀+0.092x(R²=0.758). [Conclusion] In the effect of wind gathering effect, when the wind direction angle β=60°, h=9 cm wind guide plate has the best wind accumulation effect. The parameters of the constructed prediction model were reasonable, and the model has a high degree of fitting, which can provide theoretical support for the wind speed prediction at each point at the height of 1/2 outlet under the interference of the wind guide plate.

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Last Update: 2023-10-10