室内自然置换通风受热墙体特性研究与实验模拟探讨

Investigation into Characteristic Research and Experiment Simulation of Heated Wall in Natural Displacement Ventilated Room

分析了含有热源的室内自然置换通风过程中热力分层的流动机理,探索了自然置换通风室内气流分层的理论模型。实验研究含有单面受热垂直墙体(如太阳照射受热墙体)的室内无因次有效通风面积与热力分层界面无因次高度的函数关系,并确定出自然置换通风的室内环境空气层的厚度仅为无因次有效通风面积的函数,实验发现无因次稳定分层分布大约成线性分布。

This paper indicates the research into the fundamental fluid mechanics that leads to thermal stratification in a room containing sources of heat. The theoretical model of the ventilation flow stratification in such a room and the numerical results from this model are presented. The functional relationship between effective vent area and the non-dimensional height of the thermal interface in the natural displacement ventilated room which contains single heated vertical wall （ such as a wall heated by solar irradiation） is observed experimentally and determined that the indoor air layer thickness is only a function of non-dimensional effective vent area and the stable non-dimensional stratification takes on linear distribution.