管道属性对瓦斯爆炸冲击波传播影响规律模拟研究
发布时间：2019-02-24 19:36
【摘要】：瓦斯爆炸事故是造成群死群伤的首要灾害,对矿山安全生产构成巨大威胁。在前人研究基础上,基于计算流体动力学软件Fluent研究瓦斯爆炸数值计算方法以及管道属性对瓦斯爆炸冲击波传播的影响,为煤矿防治瓦斯爆炸及其降低危害扩大提供理论基础。本文在前人研究成果的基础上建立了描述管道内瓦斯爆炸的物理模型和数学模型,采用有限速率/涡耗散模型处理瓦斯/空气预混气体的爆炸过程,采用SIMPLEC算法处理压力-速度耦合关系,选取大涡模型作为湍流模型,提高了数值模拟精度。在验证模拟结果有效的条件下,分别对密闭管道的不同断面尺寸和不同断面形状对瓦斯/空气预混气体爆炸过程进行了数值模拟,研究表明：瓦斯爆炸整个过程的冲击波压力不断增大,压力上升速率也不断增加；管径增大,空间中瓦斯爆炸冲击波发展相对于管径较小的管道中爆炸发展过程要慢,管径瓦斯爆炸湍流强度要小,矩形管道内的冲击波最大压力总是低于圆形管道,增加速率也略低于圆形管道。
[Abstract]:Gas explosion is the most important disaster that causes mass death and injury, which poses a great threat to the safety of mine production. On the basis of previous studies, the numerical calculation method of gas explosion and the influence of pipeline properties on the propagation of gas explosion shock wave are studied based on the computational fluid dynamics software Fluent, which provides a theoretical basis for preventing and reducing gas explosion and its harm expansion in coal mines. Based on the previous research results, the physical and mathematical models of gas explosion in pipeline are established in this paper. The finite rate / vortex dissipation model is adopted to deal with the explosion process of gas / air premixed gas. The SIMPLEC algorithm is used to deal with the coupling relation between pressure and velocity, and the large eddy model is chosen as the turbulence model, which improves the accuracy of numerical simulation. Under the condition that the simulation results are valid, the gas / air premixed gas explosion process is numerically simulated for different section sizes and different section shapes of the airtight pipeline. The results show that the shock wave pressure increases and the pressure rise rate increases continuously during the whole process of gas explosion. With the increase of pipe diameter, the development of gas explosion shock wave in space is slower than that in the pipe with smaller diameter, and the turbulent intensity of gas explosion in pipe diameter is small. The maximum pressure of shock wave in rectangular pipeline is always lower than that in circular pipe. The increase rate is also slightly lower than the circular pipe.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TD712.7
本文编号：2429864
[Abstract]:Gas explosion is the most important disaster that causes mass death and injury, which poses a great threat to the safety of mine production. On the basis of previous studies, the numerical calculation method of gas explosion and the influence of pipeline properties on the propagation of gas explosion shock wave are studied based on the computational fluid dynamics software Fluent, which provides a theoretical basis for preventing and reducing gas explosion and its harm expansion in coal mines. Based on the previous research results, the physical and mathematical models of gas explosion in pipeline are established in this paper. The finite rate / vortex dissipation model is adopted to deal with the explosion process of gas / air premixed gas. The SIMPLEC algorithm is used to deal with the coupling relation between pressure and velocity, and the large eddy model is chosen as the turbulence model, which improves the accuracy of numerical simulation. Under the condition that the simulation results are valid, the gas / air premixed gas explosion process is numerically simulated for different section sizes and different section shapes of the airtight pipeline. The results show that the shock wave pressure increases and the pressure rise rate increases continuously during the whole process of gas explosion. With the increase of pipe diameter, the development of gas explosion shock wave in space is slower than that in the pipe with smaller diameter, and the turbulent intensity of gas explosion in pipe diameter is small. The maximum pressure of shock wave in rectangular pipeline is always lower than that in circular pipe. The increase rate is also slightly lower than the circular pipe.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TD712.7
【参考文献】
相关期刊论文 前10条
1 朱传杰;林柏泉;江丙友;刘谦;;瓦斯爆炸在封闭管道内冲击振荡特征的数值模拟[J];振动与冲击;2012年16期
2 赵军凯;王磊;滑帅;曹旭;;瓦斯浓度对瓦斯爆炸影响的数值模拟研究[J];矿业安全与环保;2012年04期
3 毕明树;董呈杰;周一卉;;密闭长管内甲烷-空气爆炸火焰传播数值模拟[J];煤炭学报;2012年01期
4 庞磊;张奇;李伟;向聪;谭汝媚;;煤矿巷道瓦斯爆炸冲击波与高温气流的关系[J];高压物理学报;2011年05期
5 李小东;王晶禹;白春华;刘庆明;;巷道中瓦斯爆炸诱导激波传播特性研究[J];中国安全科学学报;2009年10期
6 王海燕;曹涛;周心权;谭国庆;谢建国;姜伟;;煤矿瓦斯爆炸冲击波衰减规律研究与应用[J];煤炭学报;2009年06期
7 侯玮;曲志明;骈龙江;;瓦斯爆炸冲击波在单向转弯巷道内传播及衰减数值模拟[J];煤炭学报;2009年04期
8 贾真真;林柏泉;;管内瓦斯爆炸传播影响因素及火焰加速机理分析[J];矿业工程研究;2009年01期
9 司荣军;;管道内瓦斯爆炸传播试验研究[J];煤炭科学技术;2009年02期
10 张英浩;王志杰;;管道内瓦斯爆炸压力的传播研究[J];工业安全与环保;2009年01期
，本文编号：2429864
本文链接：https://www.wllwen.com/kejilunwen/anquangongcheng/2429864.html
