|本期目录/Table of Contents|

[1]张成均,白春华.基于20 L球罐的多相混合物扩散模拟[J].中国安全生产科学技术,2019,15(4):52-58.[doi:10.11731/j.issn.1673-193x.2019.04.008]
 ZHANG Chengjun,BAI Chunhua.Diffusion simulation of multiphase mixture based on 20 L spherical vessel[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(4):52-58.[doi:10.11731/j.issn.1673-193x.2019.04.008]
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基于20 L球罐的多相混合物扩散模拟
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
15
期数:
2019年4期
页码:
52-58
栏目:
职业安全卫生管理与技术
出版日期:
2019-04-30

文章信息/Info

Title:
Diffusion simulation of multiphase mixture based on 20 L spherical vessel
文章编号:
1673-193X(2019)-03-0052-07
作者:
张成均 白春华
(北京理工大学 爆炸科学与技术国家重点实验室,北京 100081)
Author(s):
ZHANG ChengjunBAI Chunhua
(State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China)
关键词:
多相扩散20 L球罐数值模拟点火延迟时间
Keywords:
dispersion of multiphase mixture 20 L vessel numerical simulation ignition delay time
分类号:
X937;O389
DOI:
10.11731/j.issn.1673-193x.2019.04.008
文献标志码:
A
摘要:
为更好地探索多相混合物的爆炸特性,以铝粉、乙醚、空气为研究对象,基于20 L球型爆炸罐建立三维计算模型,对气固两相和气液固三相混合物的分散过程进行数值模拟,以分析不同多相混合物分散过程的差异,并为测量多相混合物爆炸下限时的点火延迟时间设定提供参考。监测分析铝粉浓度粒子分布、流场内部湍流动能以及液相体积百分数等的演化过程,讨论混合物分散效果的差异,并确定测量爆炸下限的点火延迟时间。研究结果表明:实验工况下,液相的存在会降低粉尘云团的湍流动能、降低其扩散速度,并使粉尘云内部浓度更均匀。测量多相混合物爆炸下限时,三相混合物的最佳点火延迟时间早于气固两相混合物10~20 ms。
Abstract:
In order to explore the multiphase mixture explosion characteristics, the threedimensional calculation model with aluminum powder, ethyl ether, air as research materials was built up based on 20 L spherical explosion tank. This research simulated dispersion process of gassolid twophase mixture and gasliquidsolid three phase mixture. It analyzed the differences in the dispersion processes of different polyphase mixtures and provided a reference for the set of ignition delay time at measuring the lower limit of explosion of multiphase mixture. The evolution process of aluminum powder concentration particle distribution, turbulent kinetic energy in the flow field and liquid phase volume percentage were monitored and analyzed. The difference of mixture dispersion effects and determining the ignition delay time to measure the lower limit of explosion was discussed. The results show that the presence of liquid phase can reduce the turbulent kinetic energy of dust clouds and their diffusion rate and make the concentration more even inside the dust cloud under the same working conditions. When the lower explosive limit of explosion of multiphase mixture is measured, the optimum ignition delay time of threephase mixture is 10-20 ms earlier than that of the gassolid twophase mixture.

参考文献/References:

[1]谭汝媚,李仕雄. 高湿度下点火延迟时间对粉尘爆炸参数的影响[J].中北大学学报(自然科学版),2013,34(6):652-657. TAN Rumei, LI Sixiong. Effect of the ignition delay time on the explosion characteristic parameters of dusts in high humidity environment[J].Journal of North University of China (Natural Science Edition),2013,34(6):652-657.
[2]SCHEID M, GEILER A, KRAUSE U. Experiments on the influence of pre-ignition turbulence on vented gas and dust explosions[J].Journal of Loss Prevention in the Process Industries,2006,19(2):194-199.
[3]胡俊,浦以康. 粉尘等容燃烧容器内扬尘系统诱导湍流特性的实验研究[J].实验力学,2000,15(3):341-348. HU Jun, PU Yikang K. Experimental investigation on dispersion-induced turbulence in closed explosion vessels[J].Journal of Experimental Mechanics,2000, 15(3):341-348.
[4]刘义. 甲烷-煤尘复合体系中煤尘爆炸下限的实验研究[J]安全与环境学报,2007,7(4):129-131. LIU Yi. On lower limit of explosive coal dust in coal dust mixture with methane[J].Journal of Safety and Environment.2007,7(4):129-131.
[5]李润之. 瓦斯煤尘共存条件下的煤尘云爆炸下限[J]. 爆炸与冲击,2018,38(4):913-917. LI Runzhi. Minimum explosive concentration of coal dust cloud in the coexistence of gas and coal dust[J].Explosion and Shock Waves,2018,38(4):913-917.
[6]张博,张奇. 喷粉压力及点火延迟时间对粉尘爆炸参数的影响[J].高压物理学报,2014,28(2):183-190. ZHANG Bo, ZHANG Qi. Influence of dispersion pressure and ignition delay time on the dust explosion parameters[J].Chinese Journal of High Pressure Physics,2014,28(2):183-190.
[7]LIU Qingming, BAI Chunhua,LI Xiaodong, et al. Coal dust/air explosions in a large-scale tube [J].Fuel,2010,89(2):329-335.
[8]刘龙,杜兵. Siwek20-L装置内粉尘分散最佳状态的可视化研究[J].四川化工,2015,18(3):40-44. LIU Long, DU Bing. Thevisualization research of dust dispersion process in siwek 20-L chamber[J].Sichuan Chemical Industry,2015, 18(3):40-44.
[9]陈嘉琛,张奇,马秋菊. 20 L球型罐内不同粒径铝粉扩散的数值模拟[J].高压物理学报,2014, 28(2):202-208. CHEN Jiachen, ZHANG Qi, MA Qiuju. Numerical simulation of aluminite dust dispersion for different particle sizes in 20 L vessel[J].Chinese Journal of High Pressure Physics,2014,28(2):202-208.
[10]沈世磊,张奇,马秋菊. 湍流对铝粉爆炸特性的影响[J].兵工学报,2016,37(3):455-461. SHEN Shilei, ZHANG Qi, MA Qiuju. Effect ofturbulence on explosion characteristics of aluminum dust/air[J].Acta Armamentarii,2016,37(3):455-461.
[11]白建平,范健强. 粉尘密度对20 L球罐内粉尘分散规律影响[J].中国安全生产科学技术,2017,13(10):37-42. BAI Jianping, FAN Jianqiang. Effect of dust density on dispersion laws of dust in 20 L spherical tank[J]. Journal of Safety Science and Technology,2017, 13(10):37-42.
[12]何琰儒,朱顺兵,李明鑫. 煤粉粒径对粉尘爆炸影响试验研究与数值模拟[J].中国安全科学学报,2017,27(1):53-58. HE Tanru, ZHU Shunbing, LI Mingxin. Experimental study and numerical simulation of effect of coal particle size on dust cloud explosion[J].Journal of Safety Science and Technology,2017, 27(1):53-58.
[13]SANCHIRICO R, RUSSO P, BENEDETTO A D. CFD simulations of turbulent fluid flow and dust dispersion in the 20 liter explosion vessel[J].AIChE Journal,2013,59(7):2485-2496.
[14]SARLI V D, RUSSO P, SANCHIRICO R, et al. CFD simulations of dust dispersion in the 20 L vessel:Effect of nominal dust concentration[J].Journal of Loss Prevention in the Process Industries,2014(27):8-12.
[15]王悦,白春华. 乙醚云雾场燃爆参数实验研究[J]. 爆炸与冲击,2016,36(4):497-502. WANG Yue, BAI Chunhua. Experimental research on explosion parameters of diethyl ether mist[J].Explosion and Shock Waves,2016,36(4):497-502.
[16]王福军. 计算流体动力学分析[M].北京:清华大学出版社,2004.
[17]GORE R A, CROWE C T. Effect of particle size on modulation turbulent intensity[J].Int J Multiphase Flow,1989,15(2):279-285.
[18]樊建人,罗坤,金晗辉. 直接数值模拟三维气固两相混合层中颗粒与流体的双向耦合[J].中国电机工程学报,2003,23(4):153-157. FAN Jianren, LUO Kun, JIN Hanhui. Direct numerical simulation of the two-way coupling effects between particiles and fluid in the three-dimensional particle-landen mixing layer[J].Proceedings of the Csee,2003,23(4):153-157.

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备注/Memo

备注/Memo:
收稿日期: 2019-09-29
基金项目: 国家自然科学基金项目(11732003)
作者简介: 白春华,博士,教授,主要研究方向为多相云雾爆轰理论的研究与应用。
通信作者: 张成均,硕士研究生,主要研究方向为多相爆轰的基础理论。
更新日期/Last Update: 2019-05-09