连通容器泄爆过程的影响因素

孙玮; 王志荣; 马龙生; 刘明翰; 杨臣剑

doi:10.11883/1001-1455(2016)04-0457-08

连通容器泄爆过程的影响因素

doi: 10.11883/1001-1455(2016)04-0457-08

南京工业大学安全科学与工程学院江苏省危险化学品本质安全与控制技术重点实验室, 江苏南京 210009

基金项目:

国家自然科学基金项目 50904037

国家自然科学基金项目 51376088

江苏省高校自然科学基金项目 11KJA620001

江苏省高校自然科学基金项目 10KJB620001

江苏省“六大人才高峰”高层次人才计划资助项目 2014-XNY-007

江苏省高校“青蓝工程”中青年学术带头人计划资助项目 SJ201216

南京工业大学爆炸科学与技术国家重点实验室开放课题资助项目 KFJJ16-03M

详细信息

作者简介:
孙玮(1989—)，男，硕士研究生

通讯作者:
王志荣，wangzhirong@njtech.edu.cn

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2014-11-25
- 修回日期: 2015-02-03
- 刊出日期: 2016-07-25

Influence factors of gas explosion venting in linked vessels

Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, College of Safety Science and Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China

摘要

摘要: 以甲烷/空气混合物为研究对象，开展了连通容器气体泄爆影响因素的实验研究。结果表明：连通容器泄爆片泄爆时，随着破膜压力和量纲一泄压比的减小，大、小球容器的最大泄爆压力均增大；在等量纲一泄压比条件下，随着连接管道长度的增加，传爆容器的最大泄爆压力增大。连通容器无膜泄爆时，大球点火条件下，无论管长如何，起爆容器和传爆容器均比单个容器最大泄爆压力大。小球点火条件下，当管道长度为0.45 m时，起爆容器和传爆容器的最大泄爆压力均小于单个容器。连通容器无膜泄爆且量纲一泄压比相同时，当管道长度为0.45 m时，大、小容器内的最大泄爆压力基本相等；当管道长度为2.45 m时，大容器点火时，传爆容器最大爆炸压力大于起爆容器，但小容器点火时，起爆容器最大泄爆压力大于传爆容器；当管道长度为4.45和6.45 m时，传爆容器最大泄爆压力均大于起爆容器。
- 爆炸力学 /
- 管道长度 /
- 点火位置 /
- 泄压比 /
- 连通容器 /
- 气体泄爆
Abstract: A series of experiments were conducted to study the factors influencing gas explosion venting in methane-air mixture explosion in linked vessels. For the linked vessels, the maximum explosion venting pressure in both the big vessel and the small vessel increases when the rupture disk bursting pressure and the dimensionless ratio of the vent area to the vessel volume decrease. At the same dimensionless ratio, the maximum explosion venting pressure in the secondary vessel increases with the pipe length regardless of the ignition occurring in the big or in the small vessel. The maximum explosion venting pressures in the primary and in the secondary vessels are higher than that in the single vessel for ignition in the big vessel without a rupture disk. However, when the pipe length is 0.45 m, the maximum explosion venting pressures in the primary and in the secondary vessel are lower than that in the single vessel for ignition occurring in the small vessel without a rupture disk. At the same dimensionless ratio of the vent area to the vessel volume, the maximum explosion venting pressure in the big vessel and that in the small one are close to each other when the pipe length is 0.45 m for explosion venting in linked vessels without a rupture disk. However, when the pipe length is 2.45 m, the maximum explosion venting pressure in the primary vessel is higher than that in the secondary vessel for ignition in the small vessel. When the pipe length is 4.45 m or 6.45 m, the maximum explosion venting pressure in the secondary vessel is higher than that in the primary vessel.
- mechanics of explosion /
- pipe length /
- ignition position /
- ratio of vent area to vessel volume /
- linked vessels /
- gas explosion venting

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图 1 连通容器结构示意图^[15]

Figure 1. Schematic diagram of the linked spherical vessels^[15]

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图 2 大球中心点火起爆容器泄爆压力时程曲线

Figure 2. Pressure histories of explosion venting in the primary vessel when ignited in the big vessel

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图 3 大球中心点火传爆容器泄爆压力时程曲线

Figure 3. Pressure histories of explosion venting in the secondary vessel when ignited in the big vessel

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图 4 小球中心点火起爆容器泄爆压力时程曲线

Figure 4. Pressure histories of explosion venting in the primary vessel when ignited in the small vessel

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图 5 小球中心点火传爆容器泄爆压力时程曲线

Figure 5. Pressure histories of explosion venting in the secondary vessel when ignited in the small vessel

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图 6 大球点火时，不同管长连通容器的泄爆压力时程曲线

Figure 6. Histories of explosion venting pressure in linked vessels with different pipe lengths when ignited in the big vessel

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图 7 小球点火时，不同管长连通容器的泄爆压力时程曲线

Figure 7. Histories of explosion venting pressure in linked vessels with different pipe lengths when ignited in the small vessel

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图 8 不同破膜压力条件下，大球容器泄爆的压力时程曲线

Figure 8. Pressure histories of explosion venting of big vessel under different rupture disk bursting pressures

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图 9 不同破膜压力条件下，小球容器泄爆的压力时程曲线

Figure 9. Pressure histories of explosion venting of small vessel under different rupture disk bursting pressures

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表 1 不同泄爆位置下连通容器的泄爆特性

Table 1. Characteristic of explosion venting pressure in linked vessels at different positions of explosion venting

点火位置	泄爆口位置	A/cm²	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa
小球点火	小球泄爆	5.30	0.811 9	0.328 0
小球点火	大球泄爆	5.30	0.697 8	0.453 7
小球点火	大、小球泄爆	5.30	0.594 2	0.254 7
大球点火	小球泄爆	5.30	0.374 5	1.189 3
大球点火	大、小球泄爆	5.30	0.406 3	1.146 6

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表 2 不同连通方式的容器大球中心点火时，大、小球容器的最大泄爆压力

Table 2. Maximum explosion venting pressure in the big and the small vessels in linked vessels with different pipe connections when ignited in big vessel

d/mm		p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa
大球	小球	两球对接		一段管连接		两段管连接		三段管连接
50.0	30.0	0.564 9	0.540 9	0.515 3	0.828 4	0.510 6	0.973 1	0.458 9	1.020 2
40.0	23.0	0.555 7	0.582 1	0.547 3	0.875 5	0.551 8	1.067 5	0.553 3	1.110 3
30.0	17.5	0.618 3	0.632 4	0.525 5	0.962 2	0.577 7	1.209 0	0.589 4	1.292 5
23.0	13.0	0.635 6	0.654 4	0.542 7	1.015 0	0.590 9	1.299 5	0.667 3	1.301 1

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表 3 不同管长连通容器给定破膜压力并大球中心点火时，大、小球容器的最大泄爆压力

Table 3. Maximum explosion venting pressure in linked vessels with different pipe lengths under given rupture pressures when ignited in big vessel

L/m	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa
L/m	p_b=0.164 4 MPa		p_b=0.209 8 MPa		p_b=0.305 5 MPa		p_b=0.320 1 MPa
0.45	0.622 4	0.652 5	0.704 7	0.656 9	0.628 5	0.588 8	0.633 9	0.680 4
2.45	0.510 6	0.970 3	0.612 4	1.010 8	0.629 1	1.048 0	0.597 1	1.079 9
4.45	0.660 2	1.205 0	0.643 5	1.226 8	0.626 2	1.366 7	0.617 7	1.421 3

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表 4 不同管长连通容器给定破膜压力并小球中心点火时，大、小球容器的最大泄爆压力

Table 4. Maximum explosion venting pressure in linked vessels with different pipe lengths under given rupture pressures when ignited in small vessel

L/m	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa	p_m⁽¹⁾/MPa	p_m⁽²⁾/MPa
L/m	p_b=0.164 4 MPa		p_b=0.209 8 MPa		p_b=0.305 5 MPa		p_b=0.320 1 MPa
0.45	0.533 5	0.521 8	0.551 1	0.532 3	0.589 8	0.569 1	0.643 3	0.634 2
2.45	0.510 2	0.525 9	0.543 6	0.595 9	0.586 9	0.614 0	0.589 9	0.635 8
4.45	0.695 3	0.595 6	0.683 4	0.618 8	0.690 0	0.647 8	0.731 2	0.680 2

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