PIV experiment and evaluation of air flow performance of swirl diffuser mounted on the floor
PIV experiment and evaluation of air flow performance of swirl diffuser mounted on the floor
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DOI：
10.1016/j.enbuild.2017.09.045
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发表时间：
2017-12
影响因子：
6.7
通讯作者：
Angui Li;Changqing Yang;Tong Ren;Xin Bao;E. Qin;Ran Gao
中科院分区：
文献类型：
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作者：
Angui Li;Changqing Yang;Tong Ren;Xin Bao;E. Qin;Ran Gao
为了获得满意的空调通风效果，地板送风置换通风在许多民用建筑中得到了广泛的应用。在地板送风置换通风系统中，安装在地板上的旋流扩散器被广泛用于向占用区域提供新鲜空气。本文采用二维粒子图像测速技术（2D-PIV）对旋流扩压器的气流分布特性进行了研究。实验是在全尺寸室内进行的，以获得旋流扩压器的可靠数据。已进行流动可视化，以确定旋流射流的形状。利用2D-PIV系统对旋流扩压器的流场进行了测量，为分析旋流扩压器上方的气流分布提供了依据。借助流场显示和PIV测试技术，对旋流扩压器上方气流的宏观和微观结构进行了详细的研究。同时，还得到了中心线速度衰减系数（K值）和卷吸比。本文的研究工作提供了旋流扩压器上方气流流动的详细实验数据，为风口装置的选择提供了参考，也为后续数值模拟研究提供了依据。
In order to obtain satisfactory effect of air conditioning and ventilation, the floor–supply displacement ventilation has widely applied in many civil buildings. Swirl diffusers mounted on the floor are widely used to provide fresh air into the occupied zone in the floor–supply displacement ventilation system. This paper studied the air distribution performance of swirl diffuser by 2D-PIV (particle image velocimetry). The experiment was implemented in a full-scale room to achieve reliable data of swirl diffusers. Flow visualizations have been carried out to determine the shape of the swirl jet. The whole velocity field was measured by 2D-PIV system, which is very useful to analyze air distribution above the swirl diffuser. With the aid of the flow visualizations and PIV test technology, the macro and micro structure of the air flow above the swirl diffuser is specified in more detail. Moreover, the centerline velocity decay coefficient (K value) and entrainment ratio were obtained. The research work of this paper provides detailed experimental data of air flow above the swirl diffuser, which provide the reference for selection of air terminal devices and a basis for follow-up numerical simulation study.