置换通风的实验研究

通过对单一热源情况的实验，得到了置换通风时垂直方向的温度梯度和三维温度场，并对不同墙壁的传热系数和不同的外环境温度作了４个对比实验，结果表明：①热源不影响房间温度水平方向上的均匀度，热源或污染源无横向扩散；②除热源上方有较大的上升气流外，整个速度场均匀平稳；③围护结构的热损失对温跃层高度无明显影响，外部环境温度则使室内温度垂直分布有所改变。

Experiment of indoor temperature and velocity field for displacement ventilation

Obtains measured results of vertical temperature distribution and three dimension temperature filed in a single heat source condition, the experiment results related to different heat transfer coefficients and outdoor temperature revealing that: (1) the heat source exerts little influence on the horizontal distribution of indoor temperature and no heat or pollution spreading is observed; (2) the air velocity inside the room is quite uniform everywhere with the only exception of an upward convective thermal jet from the heat source; (3) heat loss through the envelop has minor effects on height of the thermocline and the outside temperature can somewhat change the vertical temperature distribution indoor.