| 高原山地城市重气泄漏扩散的示踪实验研究 |
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| 引用本文： | 杜文静,张朝能,宁平,杨丽娟.高原山地城市重气泄漏扩散的示踪实验研究[J].环境工程学报,2013,7(3):1101-1105. |
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| 作者姓名： | 杜文静 张朝能 宁平 杨丽娟 |
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| 作者单位： | 1. 昆明理工大学环境科学与工程学院,昆明,650093
2. 临沧市环境科学研究所,临沧,677000 |
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| 基金项目： | 云南省应用基础研究项目-高原地区重气泄漏扩散的环境风险研究(2010ZC036);昆明理工大学分析测试基金资助项目 |
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| 摘 要： | 为分析高原山区城市(个旧市)重气泄漏扩散规律,进行了重气泄漏扩散环境风洞实验。实验表明,重气浓度主要集中于近地层,测点的重气浓度随风速增大先增大后减小,存在一个危险风速,通过曲线拟合所得危险风速值与风洞实验所得危险风速值相近。在该风速下,重气浓度达到最大,且粘滞系数也最大,结果表明,粘滞系数越大越不利于重气的扩散。
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| 关 键 词： | 重气 粘滞系数 风洞 风速 浓度 |
| 收稿时间： | 9/4/2012 12:00:00 AM |
Experimental study on trace of dense gas dispersion in plateau cities |
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| Du Wenjing,Zhang Chaoneng,Ning Ping and Yang Lijuan.Experimental study on trace of dense gas dispersion in plateau cities[J].Techniques and Equipment for Environmental Pollution Control,2013,7(3):1101-1105. |
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| Authors: | Du Wenjing Zhang Chaoneng Ning Ping and Yang Lijuan |
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| Institution: | Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650093, China;Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650093, China;Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650093, China;Lincang Research Institute of Environmental Science,Lincang 677000, China |
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| Abstract: | This paper presents the wind-tunnel experimental result of dense gas dispersion in plateau cities. The result shows that the concentration of dense gas is higher near the ground than the other heights, and the change is not linear with the increasing of wind speed, and the change of concentration increases first then decreases. Thus, the concentration of dense gas reaches a maximum under a value of wind speed, which is dangerous wind speed. The value of dangerous wind speed which is calculated by the way of curve fitting is similar to the result which is surveyed by wind tunnel experiment. In addition, the value of viscous coefficient also reaches maximum under the dangerous wind speed, and it blocks the dispersion of dense gas with the increase of viscous coefficient. |
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| Keywords: | dense gas viscous coefficient wind tunnel wind speed concentration |
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