本文主要研究内容
作者徐丹（2019）在《天然气管道泄漏的数值模拟研究》一文中研究指出：天然气在我国清洁能源中扮演着越来越重要的角色,其应用范围越来越广泛。然而,天然气具有一些潜在的危险特性,是一种典型的易燃易爆品。天然气的运输途径比较单一,管道运输是其主要运输方式,而且运输难度相对很大。天然气的运输安全性要求极高,因为天然气遇火会爆炸,极容易引起恐慌,造成人、财、物的重大损失,而且天然气泄漏还会造成大气污染、水污染等,影响人们的正常生活。为减少天然气管道泄漏爆炸事故的发生,降低事故的危害后果,就必须采取有效手段进行控制。因此,可以通过数值仿真模拟,研究天然气管道泄漏后的扩散规律,从而能为此类事故的抢险救援提供方案。本文以某市的天然气支线压力管道作为研究对象,以射流理论、气体流动基本控制方程和管道泄漏模型为基础,应用GAMBIT软件构建了天然管道泄漏扩散的几何模型,改变风速和泄漏孔径大小,改变障碍物的高度和障碍物到泄漏源中心点的距离等条件,利用FLUENT软件得出了在不同条件下的天然气管道泄漏扩散规律。研究结果显示:天然气管道泄漏开始时,气体从泄漏口处高速射流喷向大气,并不断向高空扩散,泄漏口附近的浓度最高。随着泄漏孔径的增大,天然气扩散的区域会随着孔径的增大而增大,即天然气扩散的范围越广。风速对泄漏天然气流的扩散起推动作用,使其沿顺风方向近地侧扩散,能改变天然气泄漏扩散的空间区域分布,风速与天然气的水平扩散距离成正比,与扩散高度呈反比。障碍物高度越高,天然气在下风向扩散的横向扩散距离越小,但是抬升作用使得天然气扩散高度增加。障碍物迎风面一侧,天然气积聚浓度高,其分布范围大小与障碍物到泄漏源中心点的距离成正比。由模拟结果可知,如果发生天然气管道泄漏事故,应急救援人员应该迅速遣散泄漏口附近的人员,并对顺风方向区域范围内进行封锁警戒;如果泄漏源顺风方向处有障碍物,则障碍物顺风侧聚集的天然气浓度很高,应加大对障碍物的迎风侧救援并加强高空通风,最大限度降低事故后果。图[21]表[9]参[63]
Abstract
tian ran qi zai wo guo qing jie neng yuan zhong ban yan zhao yue lai yue chong yao de jiao se ,ji ying yong fan wei yue lai yue an fan 。ran er ,tian ran qi ju you yi xie qian zai de wei xian te xing ,shi yi chong dian xing de yi ran yi bao pin 。tian ran qi de yun shu tu jing bi jiao chan yi ,guan dao yun shu shi ji zhu yao yun shu fang shi ,er ju yun shu nan du xiang dui hen da 。tian ran qi de yun shu an quan xing yao qiu ji gao ,yin wei tian ran qi yu huo hui bao zha ,ji rong yi yin qi kong huang ,zao cheng ren 、cai 、wu de chong da sun shi ,er ju tian ran qi xie lou hai hui zao cheng da qi wu ran 、shui wu ran deng ,ying xiang ren men de zheng chang sheng huo 。wei jian shao tian ran qi guan dao xie lou bao zha shi gu de fa sheng ,jiang di shi gu de wei hai hou guo ,jiu bi xu cai qu you xiao shou duan jin hang kong zhi 。yin ci ,ke yi tong guo shu zhi fang zhen mo ni ,yan jiu tian ran qi guan dao xie lou hou de kuo san gui lv ,cong er neng wei ci lei shi gu de qiang xian jiu yuan di gong fang an 。ben wen yi mou shi de tian ran qi zhi xian ya li guan dao zuo wei yan jiu dui xiang ,yi she liu li lun 、qi ti liu dong ji ben kong zhi fang cheng he guan dao xie lou mo xing wei ji chu ,ying yong GAMBITruan jian gou jian le tian ran guan dao xie lou kuo san de ji he mo xing ,gai bian feng su he xie lou kong jing da xiao ,gai bian zhang ai wu de gao du he zhang ai wu dao xie lou yuan zhong xin dian de ju li deng tiao jian ,li yong FLUENTruan jian de chu le zai bu tong tiao jian xia de tian ran qi guan dao xie lou kuo san gui lv 。yan jiu jie guo xian shi :tian ran qi guan dao xie lou kai shi shi ,qi ti cong xie lou kou chu gao su she liu pen xiang da qi ,bing bu duan xiang gao kong kuo san ,xie lou kou fu jin de nong du zui gao 。sui zhao xie lou kong jing de zeng da ,tian ran qi kuo san de ou yu hui sui zhao kong jing de zeng da er zeng da ,ji tian ran qi kuo san de fan wei yue an 。feng su dui xie lou tian ran qi liu de kuo san qi tui dong zuo yong ,shi ji yan shun feng fang xiang jin de ce kuo san ,neng gai bian tian ran qi xie lou kuo san de kong jian ou yu fen bu ,feng su yu tian ran qi de shui ping kuo san ju li cheng zheng bi ,yu kuo san gao du cheng fan bi 。zhang ai wu gao du yue gao ,tian ran qi zai xia feng xiang kuo san de heng xiang kuo san ju li yue xiao ,dan shi tai sheng zuo yong shi de tian ran qi kuo san gao du zeng jia 。zhang ai wu ying feng mian yi ce ,tian ran qi ji ju nong du gao ,ji fen bu fan wei da xiao yu zhang ai wu dao xie lou yuan zhong xin dian de ju li cheng zheng bi 。you mo ni jie guo ke zhi ,ru guo fa sheng tian ran qi guan dao xie lou shi gu ,ying ji jiu yuan ren yuan ying gai xun su qian san xie lou kou fu jin de ren yuan ,bing dui shun feng fang xiang ou yu fan wei nei jin hang feng suo jing jie ;ru guo xie lou yuan shun feng fang xiang chu you zhang ai wu ,ze zhang ai wu shun feng ce ju ji de tian ran qi nong du hen gao ,ying jia da dui zhang ai wu de ying feng ce jiu yuan bing jia jiang gao kong tong feng ,zui da xian du jiang di shi gu hou guo 。tu [21]biao [9]can [63]
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论文作者分别是来自安徽理工大学的徐丹，发表于刊物安徽理工大学2019-07-08论文，是一篇关于天然气管道论文,泄漏论文,数值模拟论文,安徽理工大学2019-07-08论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自安徽理工大学2019-07-08论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：天然气管道论文; 泄漏论文; 数值模拟论文; 安徽理工大学2019-07-08论文;