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Detailed experimental investigation of air speed field induced by ceiling fans

机译:吊扇引起的风速场的详细实验研究

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Comfort cooling by ceiling fans is cost-effective and energy-efficient compared to compressor-based cooling and fans are commonly used in tropical and subtropical countries. There are however limited data and design tools supporting the design of fan systems, especially for situations where there are multiple fans. In this paper, we investigate airflow profiles induced by a single fan and multiple fans using high spatial resolution air speed measurements (5,760 and 20,160 measuring points for the two cases respectively) in a climatic chamber. To authors' knowledge, this is the first time that interaction between multiple fans has been reported. We developed typical airflow patterns from the measurements and further validated them via smoke visualization. The single-fan results are consistent with previous studies of this configuration, providing additional refinements. For the multiple-fan case, both the difference of fan speed levels and the distance between the fans affect the interacting airflow profiles of the fans in complex ways. When fans are close enough, the combined air speed profile cannot be extrapolated from the profile of a single fan. All the measurement results are open sourced: raw data is included in the supplementary materials and can be visualized via an online platform (single fan, multiple fans). The data and the tool can be used to validate CFD models and inform fan layout design.
机译:与基于压缩机的冷却相比,吊扇的舒适冷却具有成本效益和能源效率,并且风扇通常用于热带和亚热带国家。但是,支持风扇系统设计的数据和设计工具有限,特别是在有多个风扇的情况下。在本文中,我们使用气候空间中的高空间分辨率空气速度测量(两种情况分别为5760和20160个测量点)来研究由单个风扇和多个风扇引起的气流分布。据作者所知,这是首次报道多个粉丝之间的互动。我们从测量结果中得出典型的气流模式,并通过烟雾可视化进一步验证了它们。单风扇结果与以前对该配置的研究一致,提供了更多改进。对于多风扇情况,风扇速度水平的差异以及风扇之间的距离都会以复杂的方式影响风扇的相互作用气流分布。当风扇足够靠近时,无法从单个风扇的轮廓中推断出组合的风速曲线。所有测量结果都是开源的:原始数据包含在补充材料中,并且可以通过在线平台(单风扇,多风扇)可视化。数据和工具可用于验证CFD模型并告知风扇布局设计。

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