C2H4/N2O预混气体的爆轰性能与火焰淬熄特性

李玉艳; 蒋榕培; 李智鹏; 徐森; 潘峰; 解立峰

doi:10.11858/gywlxb.20190845

C₂H₄/N₂O预混气体的爆轰性能与火焰淬熄特性

doi: 10.11858/gywlxb.20190845

李玉艳^{1, 2,},
蒋榕培³,
李智鹏³,
徐森^1,*, ,,
潘峰^{1, 2},
解立峰¹

1.
南京理工大学化工学院，江苏南京　210094
2.
国家民用爆破器材质量监督检验中心，江苏南京　210094
3.
北京航天实验技术研究所，北京　100074

详细信息

作者简介:
李玉艳（1985－），女，博士研究生，主要从事推进剂安全性能研究. E-mail：lyy.piao@163.com

通讯作者:
徐　森（1981－），男，博士，副教授，主要从事含能材料研究. E-mail：pfhycc@163.com

中图分类号: O643.2; TJ55
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出版历程
- 收稿日期: 2019-12-17
- 修回日期: 2020-01-05

Detonation and Quenching Characteristics of Premixed C₂H₄/N₂O

LI Yuyan^{1, 2
,},
JIANG Rongpei³,
LI Zhipeng³,
XU Sen^{1,*
, ,},
PAN Feng^{1, 2},
XIE Lifeng¹

1.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
National Quality Supervision and Inspection Center for Industrial Explosive Materials, Nanjing 210094, Jiangsu, China
3.
Beijing Institute of Aerospace Testing Technology, Beijing 100074, China

摘要

摘要: 采用自制的燃爆实验装置对C₂H₄/N₂O预混气体的爆轰性能与火焰淬熄特性进行了实验研究。结果表明：在大直径有机玻璃管中预混气体均经历了爆燃转爆轰过程，点火初期火焰速度及加速度在内径为5、10和15 mm的管道中依次减小；预混气体中加入CO₂（2.4%，质量分数）后，火焰加速进程明显延缓，点火初期处于稳定燃烧阶段；预混气体的稳定爆速为2 207 m/s，爆压为3.92 MPa，与理论值一致；常压下预混火焰在小直径不锈钢管中的临界淬熄管径为0.5～0.7 mm，预混气体火焰传播速度越大，管径越大，淬熄越困难。依据淬熄管径、湍流火焰速度和淬熄管道长度的关系，可计算防回火管道的有效长度，从而为防回火装置设计提供参考。
- 预混气体 /
- 爆速 /
- 爆压 /
- 淬熄 /
- C₂H₄/N₂O
Abstract: The detonation and the flame quenching properties of premixed gas C₂H₄/N₂O in the combustion channels were studied experimentally using a self-developed flame propagation experiment. The results show that the premixed gas achieves the transition from deflagration to detonation in all the PMMA channels with the diameters of 5 mm, 10 mm and 15 mm, and the flame speed and acceleration rate decreased gradually with the increase of the channel diameter. 2.4% CO₂ (mass fraction) diluent flame undergoes a process of stable combustion at the initial stage. The steady detonation speed and pressure are 2 207 m/s and 3.92 MPa, respectively, which are consistent with the theoretical values. The critical quenching diameter is 0.5–0.7 mm. The higher the propagation speed of the flame, the larger the channel diameter, the more difficult the flame quenching. According to the relationship between quenching diameter, turbulent flame velocity and quenching distance, the length of the flame arresters passageway length is calculated, which provides a reference for designing flashback arresters.
- premixed gas /
- detonation velocity /
- overpressure /
- quenching /
- C₂H₄/N₂O

HTML全文

图 1 有机玻璃管C4示意图(单位：mm)

Figure 1. Schematic of the PMMA channel C4 (Unit：mm)

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图 2 组合管道示意图(单位：mm)

Figure 2. Schematic of the combination channel (Unit：mm)

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图 3 不同管径管道中火焰阵面传播速度随时间变化曲线

Figure 3. Flame speed as a function of time in channels with various diameters

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图 4 不同管径管道中火焰加速度随时间的变化曲线

Figure 4. Flame acceleration as a function of time in channels with various diameters

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图 5 C1管中C₂H₄/N₂O和C₂H₄/N₂O/CO₂的火焰传播速度随时间变化曲线

Figure 5. Flame speed of C₂H₄/N₂O and C₂H₄/N₂O/CO₂ as a function of time in the channel C1

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图 6 管道C4中火焰前端速度随时间变化曲线

Figure 6. Flame speed as a function of time in the channel C4

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图 7 管道C4中8个压力传感器记录的压力曲线

Figure 7. Pressure profiles versus time obtained by eight pressure gauges in the channel C4

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图 8 压力峰值变化曲线

Figure 8. Plots of maximum overpressure obtained in the channel C4

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图 9 火焰传播速度、冲击波速度和C-J速度曲线

Figure 9. Flame speed, shock wave velocity and C-J velocity curves

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图 10 组合管道中火焰传播实测图像

Figure 10. Image of the flame propagation in combination channels

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图 11 组合管道中预混火焰淬熄情况

Figure 11. Diagram of the flame behaviors in combination channels

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图 12 加速管长度不同时火焰传播速度随时间变化曲线

Figure 12. Flame acceleration process as a function of time in accelerating channels with different lengths

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表 1 有机玻璃管道尺寸

Table 1. Geometrical characteristics of PMMA channels

Channel	l/mm	d/mm	l/d	V/mL
C1, smooth	1 400	5	280	27.5
C2, smooth	1 400	10	140	109.9
C3, smooth	1 400	15	93	247.3
C4, rough	2 000	15	133	112.5
Note: l is the length of the PMMA channel; d is the inner diameter of the PMMA channel; V is the volume of the channel.

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