Airflow characteristics generated by fabric air dispersion ventilation
Airflow characteristics generated by fabric air dispersion ventilation
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DOI：
10.1177/1420326x15584424
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发表时间：
2015-05
影响因子：
3.6
通讯作者：
Xiaoli Wang;Angui Li
中科院分区：
文献类型：
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作者：
Xiaoli Wang;Angui Li
对织物空气分散系统（FADS）的气流组织特性进行了实验研究。射流供给速度和出口方向是影响FADS流场的主要因素。通过可视化实验对FADS的流场结构进行了描述和验证，并与传统的矩形、圆形喷嘴和直线缝扩压器的流场进行了比较。分析了不同出口方向组合下的诱导和流动汇合现象。实验结果表明，这种诱导现象可以产生更多的气流模式，FADS可以满足实际工程的不同要求。通过速度场测量，研究了送风口处的湍流强度、最大速度衰减和速度分布的自相似性。研究表明，FADS模型的二维流动特性在发达区域可视为平面自由射流。研究结果为FADS在暖通空调系统中的应用提供了有益的指导。
The air distribution characteristics of a fabric air dispersion system (FADS) were investigated experimentally in a full-scale chamber. The jet supply velocity and outlet orientation were selected as the major factors that affect the FADS airflow field. The FADS airflow structure was described and verified in a visualization experiment and compared with the air patterns of the traditional rectangular, circular nozzle and linear slot diffusers. The induction and flow junction phenomena were analysed under different combinations of outlet orientations. Experimental results showed that this induction phenomenon can create more airflow patterns and that the FADS can meet different requirements in practical engineering. The turbulence intensity of the air supply orifices, the maximum velocity decay, and the self-similarity of the velocity profiles were examined through velocity field measurements. Our research illustrated the advantages of two-dimensional flow characteristics of the FADS model that can be treated as a plane free jet in the developed region. The phenomenon we studied should provide useful guide for the application of the FADS to heating, ventilation, and air-conditioning systems.