Experimental Study on Fan-Induced Airflow Evaluation by Comparing the Power Spectrum, Turbulence Intensity and Draught Rate Methods
Experimental Study on Fan-Induced Airflow Evaluation by Comparing the Power Spectrum, Turbulence Intensity and Draught Rate Methods
复制标题
功率谱法、湍流强度法和通风率法比较风扇引起气流评估的实验研究
DOI：
10.1080/14733315.2013.11684021
复制
发表时间：
2013-12
影响因子：
1.5
通讯作者：
Zhang, Wei
中科院分区：
文献类型：
--
作者：
Li, Angui;Gao, Ran;Mei, Sen;Zhang, Wei
摘要在炎热的气候条件下，舒适的室内环境是很重要的。通常采用机械风扇来冷却室内空气。然而，已经发现，来自这种风扇的气流是不舒适的，特别是与自然风相比。已经知道封闭空间中的人工气流会扰乱头发、刺激眼睛并使居住者分心。本文介绍了家用气流诱导器具特性的实验研究结果。在实验室进行的实验的细节进行了说明。对四种常用电器进行了测试，并选择了两种工作条件。采用功率谱密度函数对气流动态特性进行了评价。初步结论表明，功率谱指数由平均风速和风速剖面的间歇性决定。然而，即使是具有动态特性的机械气流，如移动和不稳定性，也不能完全复制自然风。需要风扇气流出口的高度与宽度的小比率，以便更多的周围空气可以参与流动，并且为居住者提供更舒适的气流。
Abstract In hot climates a comfortable indoor environment is important. Mechanical fans are often introduced to cool the indoor air. However, it has been found that the airflow from such fans is not comfortable, especially compared with natural wind. Artificial airflow in an enclosure has been known to disturb hair, irritate eyes, and distract occupants. This paper presents the result of an experimental study on the characteristics of household airflow inducing appliances. The details of experiments carried out in the laboratory are described. Four kinds of common appliances were tested and two operating conditions were chosen. The power spectrum density function was used to evaluate the airflow dynamic characteristics. The preliminary conclusion shows that the power spectrum exponent is determined by the mean air velocity and the intermittence of the air velocity profiles. However, even mechanical airflow with dynamic characteristics such as shift and intermittence cannot exactly replicate natural wind. A small ratio of height to width of the fan airflow outlets is required so that more surrounding air can be involved in the flow, and more comfortable airflow is available for occupants.
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影响因子：
3.1
作者：
B. Griefahn;C. Künemund;U. Gehring
通讯作者：
B. Griefahn;C. Künemund;U. Gehring
影响因子：
11.8
作者：
K. Kovanen;O. Seppänen;K. Sirén;A. Majanen
通讯作者：
K. Kovanen;O. Seppänen;K. Sirén;A. Majanen
DOI：
10.1016/j.jweia.2010.02.005
发表时间：
2010-08
影响因子：
4.8
作者：
M. Türk;Stefan Emeis
通讯作者：
M. Türk;Stefan Emeis
DOI：
--
发表时间：
1987
期刊：
Ashrae Transactions
影响因子：
--
作者：
H. Hanzawa;A. Melikov;P. Fanger
通讯作者：
H. Hanzawa;A. Melikov;P. Fanger
影响因子：
6.7
作者：
FANGER, PO;MELIKOV, AK;RING, J
通讯作者：
RING, J