大空间建筑局部机械通风辅助自然通风特性模拟

Numerical Simulation of Multi-component Natural Ventilation in Large Space Buildings Locally Assisted by Mechanical Ventilation

本文采用了数值模拟的方法,在大空间建筑物中拟定一个固定热源,并且对单侧风压和热压自然通风,单侧通风加屋顶机械排风,穿堂风加屋顶机械排风这三种不同的耦合方式进行了模拟并得到温度分布。模拟结果发现,自然通风能够较好的对建筑物的下部空间进行通风,顶部机械通风能够在一定程度上改善建筑物上部的空气环境,建筑物可根据内部结构适当调整通风方式。

To obtain the temperature distributions of three different coupling methods of natural pressure ventilation:unilateral ventilation plus roof mechanical ventilation, draft ventilation and roof mechanical ventilation, a numerical simulation was applied with a assumed heat source at the button of the building. The simulation results show that the natural ventilation can do better in ventilation at the lower space of the building. The top mechanical ventilation can improve the air environment in the upper part of the building to a certain extent. Designers can properly adjust the ventilation mode according to the internal structure.