20 L近球形容器中微米级铝粉的爆炸特性

陈晓坤; 张自军; 王秋红; 邓军; 李海涛; 徐青峰

doi:10.11883/bzycj-2017-0101

20 L近球形容器中微米级铝粉的爆炸特性

doi: 10.11883/bzycj-2017-0101

陈晓坤^{1, 2},
张自军^{1, 2},
王秋红^{1, 2, ,},
邓军^{1, 2},
李海涛^{1, 2},
徐青峰^{1, 2}

1.
西安科技大学安全科学与工程学院, 陕西西安 710054
2.
西安科技大学安全科学与工程学院陕西省煤火灾害防治重点实验室, 陕西西安 710054

基金项目:

国家自然科学基金青年科学基金项目 51504190

国家重点研发计划项目 2016YFC0800102

陕西省国际科技合作与交流计划项目 2016KW-070

详细信息

作者简介:
陈晓坤(1961-), 男, 教授, 博士生导师

通讯作者:
王秋红, wangqiuhong1025@126.com

中图分类号: O381;X932
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- 被引次数: 29
出版历程
- 收稿日期: 2017-03-30
- 修回日期: 2017-07-21
- 刊出日期: 2018-09-25

Explosion characteristics of micro-sized aluminum dust in 20 L spherical vessel

CHEN Xiaokun^{1, 2},
ZHANG Zijun^{1, 2},
WANG Qiuhong^{1, 2
, ,},
DENG Jun^{1, 2},
LI Haitao^{1, 2},
XU Qingfeng^{1, 2}

1.
College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China
2.
Shanxi Key Lab of Prevention and Control of Coal Fire, College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China

摘要

摘要: 采用20 L近球形粉尘爆炸实验系统，探究微米级铝粉在不同点火延迟时间、粉尘粒径及粉尘浓度下的爆炸特性规律。结果表明：当点火延迟时间在20~120 ms范围内，铝粉最大爆炸压力和最大爆炸压力上升速率先增大后减小，随铝粉粒径增大，最佳点火延迟时间增大；在任一点火延迟时间下，粒径大于8.12 μm的铝粉最大爆炸压力随粉尘粒径的减小呈增大的变化趋势；粒径大于8.12 μm的铝粉，在80~440 g/m³粉尘浓度范围内，铝粉最大爆炸压力和最大爆炸压力上升速率先增大后减小，且铝粉粒径越小，对应的最猛烈爆炸粉尘浓度越低。
- 铝粉爆炸 /
- 点火延迟时间 /
- 粒径 /
- 粉尘云浓度 /
- 最大爆炸压力
Abstract: In order to investigate explosion characteristics of micro-sized aluminum dust, a series of experiments were carried out to reveal the influences of ignition delay time, dust particle size and dust concentration on explosion parameters of aluminum dust using a 20 L nearly spherical dust explosion experimental system. The results show that:when the ignition delay time was within 20-120 ms, the maximum explosion pressure and maximum rate of pressure rise of aluminum dust initially increased but then decreased, the optimum ignition delay time increased with increasing particle size. The maximum explosion pressure of aluminum dust with particle size greater than 8.12 μm increased with decreasing particle size. Moreover, when the particle size is greater than 8.12 μm and the dust concentration range is 80-440 g/m³, the maximum explosion pressure and pressure rise rate of aluminum dust increased at beginning and then decreased, in addition, the smaller the dust particle size, the lower the dust concentration corresponding to the most violent explosion.
- aluminum dust explosion /
- ignition delay time /
- particle size /
- dust cloud concentration /
- maximum explosion pressure

HTML全文

图 1 铝粉粒度微分分布

Figure 1. Particle size differential volume of aluminum dust

下载: 全尺寸图片幻灯片

图 2 20 L近球形粉尘爆炸实验系统

Figure 2. 20 L nearly spherical dust explosion experimental system

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图 3 不同粒径条件下点火延迟时间对铝粉爆炸特性的影响

Figure 3. Effect of ignition delay time on explosion characteristics of aluminum dust under different particle sizes

下载: 全尺寸图片幻灯片

图 4 粉尘粒径对铝粉爆炸特性的影响

Figure 4. Effect of dust particle size onexplosion characteristics of aluminum dust

下载: 全尺寸图片幻灯片

图 5 粉尘浓度对铝粉爆炸特性的影响

Figure 5. Effect of dust concentration on explosion characteristics of aluminum dust

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表 1 不同粒径和不同点火延迟时间下铝粉爆炸特性参数

Table 1. Explosion characteristic parameters of aluminum dustunder different particle sizes and different ignition delay times

d/μm	τ/ms	p_max/MPa	(dp/dt)_max/(MPa·s^-1)
8.12	20	0.272	41.505
8.12	30	0.292	221.599
8.12	40	0.271	173.190
8.12	60	0.263	65.909
8.12	80	0.259	62.776
8.12	100	0.243	34.348
8.63	20	0.258	40.513
8.63	40	0.313	48.676
8.63	60	0.311	78.554
8.63	80	0.252	69.444
8.63	100	0.247	38.574
10.98	20	0.228	23.622
10.98	40	0.252	36.393
10.98	60	0.288	48.402
10.98	80	0.237	37.568
10.98	100	0.236	35.568
17.98	20	0.092	7.656
17.98	40	0.116	12.894
17.98	60	0.186	20.412
17.98	80	0.228	27.482
17.98	100	0.316	50.340
17.98	120	0.168	22.660

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表 2 不同粉尘浓度下铝粉爆炸特性参数

Table 2. Explosion characteristic parameters of aluminum dust under different dust concentrations

d/μm	τ/ms	ρ/(g·m^-3)	p_max/MPa	(dp/dt)_max/(MPa·s^-1)
8.12	30	60	0.181	53.529
8.12	30	80	0.292	221.599
8.12	30	120	0.346	120.130
8.12	30	160	0.358	110.658
8.12	30	220	0.343	85.847
8.12	30	280	0.300	71.626
8.12	30	360	0.298	62.837
8.63	40	80	0.313	48.676
8.63	40	120	0.390	50.904
8.63	40	160	0.377	104.524
8.63	40	220	0.375	75.044
8.63	40	280	0.357	48.920
8.63	40	360	0.329	44.923
8.63	40	440	0.298	40.472
10.98	60	80	0.288	48.402
10.98	60	120	0.290	74.342
10.98	60	160	0.355	104.891
10.98	60	220	0.354	88.289
10.98	60	280	0.290	33.147
10.98	60	360	0.219	34.150
10.98	60	440	0.207	22.583
17.98	100	80	0.316	50.340
17.98	100	120	0.334	70.238
17.98	100	160	0.338	60.415
17.98	100	220	0.404	60.243
17.98	100	280	0.350	54.210
17.98	100	360	0.327	38.616
17.98	100	440	0.271	26.856

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