圆柱形管道旁侧油气泄爆实验研究

吴松林; 杜扬; 欧益宏; 张培理; 梁建军

doi:10.11883/1001-1455(2016)05-0680-08

圆柱形管道旁侧油气泄爆实验研究

doi: 10.11883/1001-1455(2016)05-0680-08

吴松林^{1, 2,},
杜扬¹,
欧益宏¹,
张培理¹,
梁建军¹

1.
后勤工程学院供油工程系，重庆 401311
2.
后勤工程学院基础部，重庆 401311

基金项目:

国家自然科学基金项目 51276195

重庆市基础与前沿研究计划项目 cstc2013jcyjA00006

详细信息

作者简介:
吴松林(1973—)，男，博士研究生，副教授, wusonglin100@163.com

中图分类号: O389
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- 被引次数: 0
出版历程
- 收稿日期: 2015-03-04
- 修回日期: 2015-06-10
- 刊出日期: 2016-09-25

Experimental study for lateral gasoline-air venting explosion in cylindrical pipeline

1.
Department of Petroleum Supply Engineering, Logistical Engineering University, Chongqing 401311, China
2.
Department of Fundamental Studies, Logistical Engineering University, Chongqing 401311, China

摘要

摘要: 油气是一种组分复杂的可燃气体，极易发生爆炸。为了研究油气在受限空间的泄爆规律，对不同体积分数油气在圆柱形直管道旁侧的单孔和双孔泄爆进行了可视化实验，获得了管道内外流场的爆炸超压规律和管道外流场的火焰特征。发现油气泄爆过程存在未燃气体从开孔泻出、形成“蘑菇云”、持续剧烈燃烧、逐渐熄灭4个阶段。通过对最大爆炸超压的数据对比分析，获得了双孔泄爆可以数倍分流单孔的外部最大超压；开孔位置距点火端越远，孔外最大超压越大；泄爆中外流场最大超压远大于内流场最大超压等结论。
- 爆炸力学 /
- 泄爆 /
- 超压 /
- 油气 /
- 圆柱形管道
Abstract: Gasoline-air, being composed of combustible components, is apt to brings about explosion accidents. In order to study the laws governing its venting explosion in a confined space, we carried out visualization experiments on a single pore and double pores laterally situated along the shell of a cylindrical pipeline with different gasoline-air volume fractions, obtained some flame characteristics of outflow field and regularities of explosion overpressure for the pipeline's internal and external flow, and found out the four stages of the venting explosion including the flam eventing from the pore, the mushroom-cloud forming, the gradual violent burning and extinguishing. Through a comparative analysis of the data of explosion overpressure, we found that the external maximum overpressure of the double pores was several times larger than that of the single pore, and that the farther away from the ignition end, the bigger the maximum overpressure of the internal flow field.
- mechanics of explosion /
- venting explosion /
- overpressure /
- gasoline-air /
- cylindrical pipeline

HTML全文

图 1 多功能智能点火器

Figure 1. Multifunctional intelligent ignition device

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图 2 实验装置及系统连接示意图

Figure 2. Diagram of experimental setup

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图 3 封闭空间油气爆炸的压力曲线(φ=1.25%)

Figure 3. Curves of pressure for gasoline-air explosion in closed space(φ=1.25%)

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图 4 油气体积分数与最大超压、火焰最大高度的关系

Figure 4. Gasoline-air volume fraction vs. maximum overpressure and flame altitude

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图 5 两种油气体积分数的外流场火焰变化过程

Figure 5. Flame changing processes of the outflow field induced by two gasoline-air volume fractions

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图 6 开孔1泄爆过程中内外流场压力曲线(φ=1.13%)

Figure 6. Curves of pressure for internal and external flow field in the process of venting explosion for pore 1(φ=1.13%)

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图 7 开孔2泄爆过程中外流场压力曲线(φ=1.13%)

Figure 7. Curves of pressure for internal and external flow field in the process of venting explosion for pore 2(φ=1.13%)

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图 8 双孔泄爆过程中外流场火焰变化过程(φ=1.40%)

Figure 8. Flame changing process of outflow filed during the venting explosion for the double cores(φ=1.40%)

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图 9 双孔泄爆过程中内外流场压力曲线(φ=1.40%)

Figure 9. Curves of pressure for internal and external flow field in the process of venting explosion for the double pores(φ=1.40%)

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表 1 单孔泄爆实验的主要参数

Table 1. Main parameters of single pore venting explosion test

实验编号	开孔	φ/%	p_B/kPa	p_C/kPa	p_D₁/E₁/kPa	h/m	t/s
1	1	0.90	38	14	650	0.8	3.2
2	1	1.10	42	19	720	1.5	4.5
3	1	1.13	53	21	730	1.6	5.6
4	1	1.17	59	27	750	2.2	5.2
5	1	1.50	200	132	810	2.8	3.6
6	1	1.55	311	180	830	2.9	3.2
7	2	1.10	90	13	740	1.8	3.5
8	2	1.20	150	23	810	2.6	4.0

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表 2 双孔泄爆实验主要参数

Table 2. Main parameters for venting explosion test for the double cores

实验编号	φ/%	p_A/kPa	p_B/kPa	p_C/kPa	p_D₁/kPa	p_E₁/kPa	h_孔1/m	h_孔2/m	t/s
1	0.90	9.0	1.5	2.0	90	32.5	0.5	0.8	3.0
2	1.20	20.0	6.5	9.0	140	220.0	0.6	1.1	2.0
3	1.23	22.0	7.0	9.5	150	280.0	0.8	1.5	1.8
4	1.40	27.5	10.0	12.5	170	330.0	0.9	1.6	1.3

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