|本期目录/Table of Contents|

[1]赵一姝,范健强,白建平,等.粉尘浓度对20 L球罐内硫磺粉尘分散过程流场特性的影响[J].中国安全生产科学技术,2018,14(7):48-53.[doi:10.11731/j.issn.1673-193x.2018.07.007]
 ZHAO Yishu,FAN Jianqiang,BAI Jianping,et al.Influence of dust concentration on flow field characteristics of sulfur dust during dispersion process in 20L spherical tank[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(7):48-53.[doi:10.11731/j.issn.1673-193x.2018.07.007]
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粉尘浓度对20 L球罐内硫磺粉尘分散过程流场特性的影响
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年7期
页码:
48-53
栏目:
学术论著
出版日期:
2018-07-31

文章信息/Info

Title:
Influence of dust concentration on flow field characteristics of sulfur dust during dispersion process in 20L spherical tank
文章编号:
1673-193X(2018)-07-0048-06
作者:
赵一姝1范健强1白建平1曾畅2王雨1
(1.重庆科技学院 安全工程学院, 重庆 401331;2.重庆市潼南区经济和信息化委员会,重庆 402660)
Author(s):
ZHAO Yishu1 FAN Jianqiang1 BAI Jianping1 ZENG Chang2 WANG Yu1
(1. College of Safety Engineering, Chongqing University of Science and Technology, Chongqing 401331, China;2. Chongqing Tongnan District Economic and Information Committee, Chongqing 402660, China)
关键词:
粉尘浓度20 L球罐流场特性数值模拟
Keywords:
dust concentration 20L spherical tank flow field characteristics numerical simulation
分类号:
X928.7;O389
DOI:
10.11731/j.issn.1673-193x.2018.07.007
文献标志码:
A
摘要:
为了解不同浓度的硫磺粉尘在20 L球罐内分散过程流场特性的变化规律,采用CFD数值模拟方法再现球罐内硫磺粉尘分散过程,揭示粉尘浓度与湍流动能、流场速度、粉尘云浓度、最佳点火延迟时间之间的关系。研究结果表明:在其他条件一定时,喷入的粉尘越少,球罐内湍流动能和流场速度的峰值越大,球心处的粉尘云等效浓度的峰值越小,粉尘颗粒滞留在球心处的时间越短,即粉尘浓度越小,最佳点火延迟时间段越小;粒径为163 μm、浓度为0.15,0.3,0.45 kg/m3的硫磺粉尘对应的最佳点火延迟时间分别是50~60,50~85,50~105 ms。
Abstract:
To understand the variation laws of the flow field characteristics of sulfur dust with different concentrations during the dispersion process in the 20L spherical tank, the dispersion process of sulfur dust in the spherical tank was reappeared by using the CFD numerical simulation method, and the relationship between the dust concentration and the turbulent kinetic energy, flow field velocity, dust cloud concentration and optimum ignition delay time were revealed. The results showed that when the other conditions were constant, the less the sprayed dust, the greater the peak values of the turbulent kinetic energy and the flow field velocity in the spherical tank, the smaller the peak value of the equivalent concentration of dust cloud at the spherical centre, and the shorter the time of the dust particles detained at the spherical centre, namely the smaller the dust concentration, the smaller the optimum ignition delay time. When the concentration of sulfur dust with the particle size of 163 μm was 0.15 kg/m3, 0.3 kg/m3 and 0.45 kg/m3, the corresponding optimum ignition delay time was 50-60 ms, 50-85 ms and 50-105 ms respectively.

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备注/Memo

备注/Memo:
国家安监总局2017年安全生产重大事故防治关键技术科技项目(chongqing-0003-2017AQ);重庆科技学院研究生科技创新计划项目(YKJCX1720720)
更新日期/Last Update: 2018-08-09