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Study of wind loading and flow characteristics on an array of parabolic trough collectors
Journal of Wind Engineering and Industrial Aerodynamics ( IF 4.8 ) Pub Date : 2021-07-20 , DOI: 10.1016/j.jweia.2021.104716
M. Azadeh 1 , M.M. Tavakol 1
Affiliation  

Wind loads and structure of the flow field around an array of parabolic trough collectors (PTCs) were investigated using Delayed Detached Eddy Simulation (DDES) method. A scaled three-dimensional (3D) model was adopted and simulated using the ANSYS-Fluent software. Several pitch angles, including θ = 0°, 45°, 135°, and 180° and the stow mode with the pitch angle, θ = 90°, and flow Reynolds number of 2×105, are considered for numerical solutions. For validation of the numerical model, the mean wind load coefficient on a stand-alone PTC and an array model of PTCs were simulated and compared with the wind tunnel data. Detailed analysis of wind characteristics and wind loading on an array for five-pitch angles was provided. Results demonstrated that except for the stow mode, the first PTC in the array experienced the maximum mean pressure in the upwind side of the PTCs model and corresponded to the maximum mean drag coefficient. Besides, the minimum mean drag coefficient belongs to the second row in the array except for the stow mode. A comparison between flow patterns around the PTCs revealed the high vorticity concentration in front of the collectors for pitch angles θ = 0° and θ = 180°.



中文翻译:

抛物线槽式集热器阵列风载流特性研究

使用延迟分离涡流模拟 (DDES) 方法研究了抛物线槽式收集器 (PTC) 阵列周围流场的风载荷和结构。采用比例缩放的三维 (3D) 模型并使用 ANSYS-Fluent 软件进行模拟。几种俯仰角,包括 θ = 0°、45°、135° 和 180° 以及具有俯仰角、θ = 90° 和流动雷诺数的收起模式2×105, 被考虑用于数值解。为了验证数值模型,模拟了独立 PTC 和 PTC 阵列模型的平均风荷载系数,并与风洞数据进行了比较。提供了对五节距角阵列的风特性和风载荷的详细分析。结果表明,除了收起模式,阵列中的第一个 PTC 在 PTC 模型的逆风侧经历了最大平均压力,并对应于最大平均阻力系数。此外,最小平均阻力系数属于阵列中除收起模式外的第二行。PTC 周围流动模式之间的比较揭示了集热器前面的高涡度集中,俯仰角 θ = 0° 和 θ = 180°。

更新日期:2021-07-21
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