Finding ways to cool buildings by natural, passive techniques is crucial in the context of global warming. For centuries, wind towers (traditional windcatchers) have been used in the Middle East for cooling purposes. In this study, the use of funnels at the openings of wind towers for wind ingress and egress is proposed primarily to increase the mass flow captured by the wind tower. The use of funnels in the wind ingress openings increases the inlet area, improving the capture of wind. In parallel, the use of funnels in the egress openings modifies the wake of the tower, which aims to ease the exit of the flow from inside the building. Several design configurations are presented, where the length and width of the funnels are changed and tested separately by computational fluid dynamics (CFD). Results of over 120 CFD simulations are presented and compared. The volumetric flow entering the wind towers increases by 10.7% in several cases. These results indicate that adding funnels to wind towers could positively influence their performance. Changing the dimensions of the funnels affects their efficacy and can increase or decrease the airflow entering the tower.

在全球变暖的背景下，寻找通过自然的被动技术为建筑物降温的方法至关重要。数百年来，中东一直使用风塔（传统的捕风器）进行冷却。在这项研究中，建议在风塔开口处使用漏斗进行风的进出主要是为了增加风塔捕获的质量流量。在进风口中使用漏斗会增加入口面积，从而改善了对风的捕获。同时，在出口处使用漏斗会改变塔的尾流，目的是减轻建筑物内部流动的流出。提出了几种设计配置，其中漏斗的长度和宽度分别通过计算流体力学（CFD）进行更改和测试。提出并比较了120多个CFD模拟的结果。在某些情况下，进入风塔的体积流量增加了10.7％。这些结果表明，向风塔中添加漏斗可能会对它们的性能产生积极影响。改变漏斗的尺寸会影响其效率，并可能增加或减少进入塔架的气流。