文章摘要
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:
作者单位
胡其渺 四川农业大学理学院四川成都611130 
姚宁 太原理工大学环境科学与工程学院山西太原030024 
马青兰 太原理工大学环境科学与工程学院山西太原030024 
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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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