| 胡其渺,姚宁,马青兰.基于标准k-epsilon湍流模型的实验室微环境数值模拟[J].海南师范大学学报自科版,2016,29(2):196-201 |
| 基于标准k-epsilon湍流模型的实验室微环境数值模拟 |
| A Numerical Simulation Method Based on Standard K-epsilon Modelin Laboratory Microenvironment |
| 投稿时间：2016-03-05 |
| DOI：10.12051/hainansfxyxb.2016.02.017 |
| 中文关键词: k-epsilon 实验室 数值模拟 CFD |
| 英文关键词: k-epsilon laboratory numerical simulation CFD |
| 基金项目: |
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| 摘要点击次数: 2501 |
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| 中文摘要: |
| 为了研究实验室微环境的气体污染物浓度分布问题，提出了基于标准k-epsilon 湍流模
型的数值模拟方法. 建立“回”形和“一”形楼道二维简化模型，对其进行网格划分. 以浓度为7.73
ppm 的NO2作为研究对象，设置不同位置的气体污染物入口，对两种二维模型的风场和NO2浓度场
进行数值模拟和分析. 结果表明，“回”形楼道不利于污染物的扩散，各区域都有污染物的分布，浓度
最低区域降幅在87.6%～96.7%；“一”形楼道模型中，inlet10、inlet14 和inlet19 分别作为入口时，B 区
域NO2浓度值很低，monitor5-9 浓度接近0. 模拟结果符合理论，可以为实验室设计选址提供一定参
考，也可以为污染气体泄露应急预案和事故预报预警机制提供依据. |
| 英文摘要: |
| A numerical simulation method based on standard k-epsilon turbulence model is proposed to analyze the distribution of gas pollutants in laboratory micro environment. A homocentric square corridor 2D model and a I-shaped are established and divided into many meshes. An air-NO2 mixture contained 7.73 ppm of NO2 is employed and the different positions are set up as inlets of NO2 to investigate the wind field and concentration field in the two 2D models. According to the
results, homocentric square corridor has poor effect in gas pollutant diffusion. Each area has the distribution of NO2 and the
maximum concentration decline is 87.6%-96.7%. In the I-shaped corridor, when inlet10, inlet14 and inlet19 are set as NO2
inlet respectively, NO2 concentration in area B is low. NO2 concentrations on monitor 5-9 are close to 0. The simulation results and theoretical analyses fit well. The results can provide reference to laboratory design and site selection. The results
can also provide evidences to emergency response plan and early warning system of gas pollutant leakage. |
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