成都地区传统与现代城市形态的街谷风环境对比分析

发布时间：2018-03-07 20:22

本文选题：街谷风环境　切入点：风环境实测　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：风环境是室外微气候重要组成部分,是判断室外公共空间的重要指标。而街道(谷)作为现代人们生活重要的场所之一,其风环境将直接影响人们的舒适度感受。又特别是在静风率偏高的成都地区,研究街谷风环境的特性及其影响因子,对提高人的舒适度感受和街道内空气质量有着重要的意义。论文首先查阅、收集国内外相关文献、书籍,梳理传统与现代城市形态的概念,重点研读风环境相关理论,找出适合街谷的湍流计算模型。其次,选取实际工况测其风环境情况,并通过Fluent软件,利用选取的湍流计算模型按照实际工况建模,对比实测与模拟得出的数据,来验证所选湍流模型能否用于论文第4章的仿真模拟。第三,分别选取成都地区传统和现代城市形态的街谷,测得其夏季和冬季的风环境情况,并对比分析由不同街谷朝向、高宽比、天空可视因子(也有称天空开阔度或天空视域因子)、下垫面粗糙程度引起风速大小的变化。第四,利用已验证的湍流计算模型从2个方面对街谷风环境仿真模拟,一是根据实测得到的已知数据模拟不同街谷夏季和冬季风环境并和实际测得风速做对比分析。二是从不同风环境影响因子值(街道高宽比、街道与主导风向的关系、天空可视因子、下垫面粗糙程度)的大小建模模拟,找出每个影响因子值的变化带来街谷风环境的变化。最后,针对以上工作得出基于风环境特性的街谷形态设计策略和建议。
[Abstract]:Wind environment is an important part of outdoor microclimate and an important index to judge outdoor public space. And street (valley) is one of the important places in modern people's life. The wind environment will directly affect people's comfortable feeling, and especially in Chengdu, where the static wind rate is high, the characteristics of street valley wind environment and its influencing factors are studied. It is of great significance to improve people's sense of comfort and air quality in the street. Firstly, the paper reviews and collects relevant literature and books at home and abroad, combs the concepts of traditional and modern urban forms, and studies the relevant theories of wind environment. Find out the turbulence calculation model suitable for the street valley. Secondly, select the actual working condition to measure the wind environment, and through the Fluent software, use the selected turbulence calculation model to model according to the actual working condition, compare the measured data with the simulation data. In order to verify whether the selected turbulence model can be used in the simulation of Chapter 4 of the thesis. Thirdly, select the traditional and modern urban forms of street valley in Chengdu area, and measure the wind environment in summer and winter, and compare and analyze the different street valley orientations. The aspect ratio, sky visibility factor (also known as sky openness or sky horizon factor), and the roughness of the underlying surface cause the change of wind speed. 4th, using the verified turbulence calculation model, the paper simulates the wind environment across the street from two aspects. The first is to simulate the summer and winter monsoon environments of different street valleys based on the known measured data and to make a comparative analysis with the wind speed measured. The other is to analyze the influence factors of different wind environments (the ratio of street height to width, the relationship between street and dominant wind direction). The size of the sky visibility factor and the roughness of the underlying surface) are modeled and simulated to find out that the change of each influence factor results in the change of the street valley wind environment. Finally, based on the above work, the design strategies and suggestions of the street valley shape based on the wind environment characteristics are obtained.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU119

【相似文献】