Study on Indoor Air Movement under the Crowding Conditions by Numerical Simulations and PIV Small-scale Experiments☆
Study on Indoor Air Movement under the Crowding Conditions by Numerical Simulations and PIV Small-scale Experiments☆
复制标题
DOI：
10.1016/j.proeng.2015.09.109
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Cong Zheng;Jing Liu
中科院分区：
文献类型：
--
作者：
Cong Zheng;Jing Liu
在机械通风房间中，人体对空气流动的阻挡作用，改变了原有的气流组织。在人群密集的场所，人群的影响会极大地改变室内空气运动，甚至使环境恶化。因此其影响不容忽视。本文采用粒子图像测速技术（PIV）和数值模拟（CFD）相结合的方法，研究了人体对室内空气流动的影响。PIV实验和数值模拟包括两种情况。一个条件是一个空房间，另一个条件是房间里有人体模型。并将实验结果与数值模拟结果进行了比较。数值模拟表明，在这两种情况下是准确的，标准k-ε模型最准确地预测了一个房间内的流动包含人群模型。本文通过数值模拟和实测结果表明，人群的存在会极大地改变建筑物内气流组织和气流停留时间。因此，在通风设计中考虑人群是很重要的。
In the mechanical ventilation room, human body will block the air flows and change the original airflow organization. In the crowd places, the influence of the crowd may greatly change the indoor air movement and even worsen the environment. So the effect can not be ignored. The paper studied the influence of the human body to the indoor air movement by using the method of Particle Image Velocimetry (PIV) and numerical simulation (CFD). The PIV experiment and numerical simulation contain two conditions. One condition is an empty room and another contains models of human body in the room. The paper compared the result of experiment and numerical simulation. Numerical simulations are demonstrated to be accurate in the two conditions, and the Standard k-ɛ model most accurately predicts the flow in a room contains crowd model. In this study, the numerical simulation and measurements show that the crowds will greatly change the air distribution and the residence time of the flows in the building. Therefore, it is important that crowds be considered in ventilation design.