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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

阐明温度和阳光在适度风环境中的作用并开发基于实验数据和数值模拟的风环境评估方法

基本信息

批准号：
07405027
负责人：
MURAKAMI Shuzo
金额：
$ 23.68万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07405027/
关键词：
moderate wind environment wind tunnel test numerical simulation

项目摘要

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.

室外风环境的评价主要是处理强风条件。在本研究中，我们提出了包括我们每天经历的相对低风条件的热环境，并提出了一个新的概念“中等风环境”，我们研究了结构。利用风洞试验和数值模拟的优点，开发一套新的风环境评价系统。近年来，我们发现在城市地区出现了一些环境问题，即由于绿地面积减少和能源消耗大而引起的温度上升，以及由于建筑物和其他城市结构的高密度而导致的近地面低速风导致的夏季室外气候恶化。基于这些现象，室外热环境舒适度评价的建立成为城市环境问题中的一个重大问题。室外环境舒适度的测量是基于外界条件的影响，来自于流场、温度场、辐射场等，也来自于人体的热平衡。在研究的第一阶段，采用对流和辐射耦合模拟的方法对城市热环境进行了分析，并在此基础上对城市热环境和空气环境的舒适度进行了综合评价。在此基础上，明确了将太阳光影响纳入风环境评价的重要性，建立了对流与辐射模拟耦合分析的风环境评价新方法。