绿色校园生态空间环境适应性研究

Research on Environmental Adaptability of Ecological Space in Green Campus

本文旨在对不同形态的校园平行形式庭院风环境进行研究,目前的相关研究主要集中在庭院的热舒适性方面,并未涉及到庭院的形式。本文采用流体力学(CFD)数字模拟的方法,将计算域离散为高精度的计算网格,使用风速变化系数以及对应的面积比例作为风场的评价标准。运用现场实测的方法对虚拟模拟方法进行验证。结果表明:在高宽比从0.5到2的这个范围内,可以通过增大单院落的高宽比来减小风速放大效应。当庭院的高宽比超过2时,该比例的增加对庭院内部的风场影响不大。当组合庭院的长宽比为0.25时,0°至30°是最佳的入射风角度。相反,75°和90°的风向不利于庭院内部通风。当组合庭院的长宽比为0.5与0.75时,0°到15°是最佳入射角度。

This article aims to study the wind environment of different forms of parallel courtyard on campuses.The current related research mainly focuses on the thermal comfort of the courtyard,and does not involve the form of the courtyard.In this paper,the method of fluid mechanics(CFD)digital simulation is used to discretize the calculation domain into a high-precision calculation grid,and the wind speed change coefficient and the corresponding area ratio are adopted as the evaluation criteria of the wind field.The method of field measurement is used to verify the virtual simulation method.The results show that the wind speed amplification effect can be reduced by increasing the aspect ratio of the single courtyard in the range of 0.5 to 2 in the aspect ratio.When the aspect ratio of the courtyard exceeds 2,the increase in this ratio has little effect on the wind field inside the courtyard.When the aspect ratio of the combined courtyard is 0.25,0°to 30°is the best incident wind angle.On the contrary,the wind directions of 75°and 90°are not conducive to ventilation inside the courtyard.When the aspect ratio of the combined courtyard is 0.5 and 0.75,0°to 15°is the best angle of incidence.