Abstract Scaled wind tunnel testing and Computational Fluid Dynamics (CFD) analysis were conducted to investigate the natural ventilation performance of a commercial multi-directional wind tower. The 1:10 scaled model of the wind tower was connected to the test room to investigate the velocity and pressure patterns inside the micro-climate. The tests were conducted at various wind speeds in the range of 0.5–5 m/s and various incidence angles, ranging from 0° to 90°. Extensive smoke visualisation experiments were conducted to further analyse the detailed airflow structure within the wind tower and also inside the test room. An accurate geometrical representation of the wind tunnel test set-up was recreated in the numerical modelling. Care was taken to generate a high-quality grid, specify consistent boundary conditions and compare the simulation results with detailed wind tunnel measurements. The results indicated that the wind tower was capable of providing the recommended supply rates at external wind speeds as low as 2 m/s for the considered test configuration. In order to examine the performance quantitatively, the indoor airflow rate, supply and extract rates, external airflow and pressure coefficients were also measured. The CFD simulations were generally in good agreement (0–20%) with the wind tunnel measurements. Moreover, the smoke visualisation test showed the capability of CFD in replicating the air flow distribution inside the wind tower and also the test room.
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机译：摘要进行了规模化风洞测试和计算流体动力学（CFD）分析，以研究商用多向风塔的自然通风性能。将比例为1:10的风塔模型连接到测试室，以研究微气候内部的速度和压力模式。测试在0.5-5 m / s的各种风速和0°至90°的各种入射角下进行。进行了广泛的烟雾可视化实验，以进一步分析风塔内部以及测试室内的详细气流结构。在数值建模中重新创建了风洞测试装置的精确几何表示。注意生成高质量的网格，指定一致的边界条件，并将模拟结果与详细的风洞测量结果进行比较。结果表明，对于考虑的测试配置，风塔能够在低至2 m / s的外部风速下提供建议的供电速率。为了定量检查性能，还测量了室内气流速率，供气和抽气速率，外部气流和压力系数。 CFD模拟通常与风洞测量结果吻合良好（0–20％）。此外，烟雾可视化测试表明CFD能够复制风塔内部以及测试室中的气流分布。
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