Clarification of the role of temperature and sunlight in the moderate wind environment and development of the method of wind environmental assessment based on experimental data and numerical simulation

室外风环境的评价主要是针对强风条件进行的。在本研究中，我们建议将我们每天经历的相对较低风条件下的热环境包括在内，并提出了一个新的概念“中等风环境”，我们对结构进行了研究。同时，我们也希望利用风洞试验和数值模拟的优势，建立一套新的风环境评价体系。例如，由于建筑物和其他城市建筑物的高密度，绿色面积的减少和大量的能源消耗导致的温度升高，以及低速风导致的夏季室外气候变差，都发生在近地面。基于这些现象，建立室外热环境舒适性评价成为城市环境问题中的一个重大课题。室外环境舒适性是根据室外环境的流场、温度场、辐射场等外界条件的影响来衡量的，本研究的第一阶段是利用对流与辐射耦合分析的方法对城市热环境进行模拟分析，并在此基础上对城市热环境与空气环境的舒适性进行综合评价。阐明了在风环境评价中考虑太阳辐射影响的重要性，建立了一种新的风环境评价方法--对流与辐射耦合分析法。

The assessment of outdoor wind environment is mainly dealing with the strong wind condition. In this research, we propose to include the thermal environment of relative lower wind condition, which we experience every day, and propose a new concept of "Moderate wind environment", which we investigate the structure. We are also aiming to develop a new system of wind environmental assessment, based on the advantages of using wind tunnel test and numerical simulation.Recently, we find some environmental problems occurred in the urban area, i. e., the rise of temperature caused by the decreasing of green area and large energy consumption, and also worse summer's outdoor climate caused by low velocity wind, occurred near the ground, due to the high density of building and other city structures. Based on these phenomena, the establishment of the outdoor thermal environment comfort assessment becomes a major issues in the urban environmental problem. The outdoor environment comfort is measured based on the influence of the extemal condition, coming from the flowfield, temperature field and the radiation field etc., and also from the thermal balance of human body.At the first stage of this research, we analyzed thermal environment of urban area by using coupled analysis of convective and radiative simulation, and then, developed a total assessment of the comfort of thermal and air environment. Then, we could clarify the importance of incorporating the effect of the sunlight to the wind environmental assessment and established a new method of wind environmental assessment, using coupled analysis of convective and radiative simulation.