天井对浙北筒屋夏季自然通风影响仿真研究

Influence of Patios of Tubular Houses on Summer Ventilation in Northern Zhejiang Province

为研究天井对于浙北筒屋式民居夏季自然通风的影响,本文采用CFD仿真方法分析不同天井工况下筒屋自然通风状况。结果表明:风压通风动力有两个,一个是迎风面与背风面风压差,另一个是筒屋上方负压对天井拔风作用。风压通风时,天井可提高筒屋中后落房间通风水平,后天井更有利于提高室内整体通风水平。热压通风时,室内流速较弱,天井对筒屋内部的通风效果并不显著。本研究将有助于更好地评价筒屋式民居的气候适应性效果,并总结出天井的通风机制及其所带来的建筑经验。

In order to study the influence of patios on the natural ventilation of tubular houses in northern Zhejiang province, CFD method was used to simulate the natural ventilation of a tubular house in different ventilation modes. The results show that there are two ventilation forces of wind pressure, one is the wind pressure difference between the windward side and the leeward side, and the other is the effect of negative pressure above the tubular house on the air pulling out of the patio. The patios can improve the windpressure ventilation in the rear rooms in the wind-pressure driven ventilation, and the rear one is more beneficial to the overall ventilation of the tubular house. The indoor velocity is weak in the thermal-pressure driven ventilation, and the ventilation effect of the patio on the interior of the tubular houses is not significant. It will make better to evaluate the effect of climate adaptability of tubular houses,and summarizes the ventilation mechanism of patios and architectural experience from them.