火焰特征量对快速烤燃的影响

肖游; 智小琦; 王琦; 于永利; 范兴华

doi:10.11858/gywlxb.20220557

火焰特征量对快速烤燃的影响

doi: 10.11858/gywlxb.20220557

肖游^1,,
智小琦^1,*, ,,
王琦¹,
于永利²,
范兴华³

1.
中北大学机电工程学院, 山西太原　030051
2.
吉林江机特种工业有限公司, 吉林吉林　132021
3.
晋西工业集团, 山西太原　030051

详细信息

作者简介:
肖　游（1996-），男，硕士研究生，主要从事战斗部毁伤技术研究. E-mail：1466407414@qq.com

通讯作者:
智小琦（1963-），女，博士，教授，主要从事战斗部毁伤技术及不敏感弹药研究.E-mail：zxq4060@sina.com

中图分类号: TJ55
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出版历程
- 收稿日期: 2022-04-06
- 修回日期: 2022-04-20
- 网络出版日期: 2022-06-17
- 刊出日期: 2022-10-11

Influence of Flame Characteristics on Fast Cook-off

XIAO You^1
,,
ZHI Xiaoqi^{1,*
, ,},
WANG Qi¹,
YU Yongli²,
FAN Xinghua³

1.
School of Electromechanical Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Jilin Jiangji Machine Special Industry, Ltd., Jilin 132021, Jilin, China
3.
Jinxi Industrial Refco Group Ltd., Taiyuan 030051, Shanxi, China

摘要

摘要: 为研究快速烤燃下池火中火焰特征量对烤燃弹的影响，建立了池火的快速烤燃模型，得到了烤燃弹的传热特性，分析了烤燃过程中烤燃弹放置高度和油池尺寸对火焰特征量的影响。结果表明：随着烤燃弹放置高度的增加，烤燃弹表面最高温度区域由上表面转移到下表面，辐射热通量峰值由烤燃弹上方转移到烤燃弹下方；随着油池尺寸增加，烤燃弹各表面温度更加均匀，烤燃弹吸收的热通量增加，烤燃弹表面温度升高。因此，快速烤燃试验中烤燃弹的放置高度与油池尺寸均会对火焰特征量造成影响，进而影响烤燃弹的快速烤燃特性。
- 快速烤燃 /
- 数值模拟 /
- 池火 /
- 油池尺寸 /
- 火焰特征量
Abstract: In order to study the influence of flame characteristics on cook-off bomb in pool fire under the condition of fast cook-off, a fast cook-off model of pool fire was established, and the heat transfer characteristics of the cook-off bomb were obtained, then the influences of the placement height of the cook-off bomb and the size of the oil pool on the flame characteristics during the burning process were analyzed. The results show that with the increasing placement height of the bomb, the highest temperature region of the bomb surface shifts from the upper surface to the lower surface, and the peak radiation heat flux shifts from the top to the bottom of the bomb. With the increasing size of the oil pool, the surface temperature of the bomb becomes more uniform, the heat flux absorbed by the bomb increases, and the surface temperature of the bomb increases. Therefore, in the fast cook-off test, both the placement height of the bomb and the size of the oil pool affect the flame characteristics, and then the fast cook-off characteristics of the bomb.
- fast cook-off /
- numerical simulation /
- pool fire /
- pool size /
- flame characteristics

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图 1 快速烤燃试验现场布置

Figure 1. Layout of the fast cook-off test

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图 2 温度-时间曲线

Figure 2. Temperature-time curves

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图 3 响应后烤燃弹的破片残骸

Figure 3. Fragment debris of the cook-off bomb after response

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图 4 快速烤燃模型

Figure 4. Model of the fast cook-off

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图 5 计算时间与网格尺寸的关系

Figure 5. Relation between calculation time and mesh size

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图 6 计算精度与网格尺寸的关系

Figure 6. Relation between accuracy and mesh size

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图 7 池火快速烤燃模拟场景

Figure 7. Simulated scene of the fast cook-off in pool fire

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图 8 火焰中测点温度随时间变化曲线

Figure 8. Temperature-time curves of gauging points in flame

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图 9 烤燃弹中心截面温度和辐射热通量

Figure 9. Temperature and radiation heat flux of the central cross-section of cook-off bomb

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图 10 烤燃弹模型与测点示意图

Figure 10. Schematic diagram of the cook-off bomb model and gauging points

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图 11 壳体不同位置的温度随时间变化曲线

Figure 11. Temperature-time curves at different positions of shell

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图 12 测点设置示意图

Figure 12. Schematic diagram of gauging point setting

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图 13 药柱径向和轴向温度随距几何中心距离的变化曲线

Figure 13. Variations of temperature in radial and axial directions with distance to the geometric center of charge

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图 14 烤燃弹放置高度不同时各表面温度变化曲线

Figure 14. Variations of each surface temperature with different heights of the cook-off bomb

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图 15 烤燃弹各表面温度随油池面积的变化

Figure 15. Variations of surface temperature of the cook-off bomb with the area of oil pool

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表 1 炸药和壳体的物性参数

Table 1. Physical parameters of explosives and shell

Material	ρ/(kg·m⁻³)	c_V/(J·kg⁻¹·K⁻¹)	λ/(W·m⁻¹·K⁻¹)
RDX	1640	1130	0.25
TNT	1510	1611	0.20
Steel	8030	502	43.00

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表 2 炸药反应动力学参数

Table 2. Reaction kinetic parameters of explosives

Explosive	$ i $	E_i /(J·mol⁻¹)	Z_i /s⁻¹	Q_i /(J·kg⁻¹)
RDX	1	2.04×10⁵	6.40×10¹⁷	2.68×10⁶
	2	1.89×10⁵	4.74×10¹⁷	−8.03×10⁶
	3	1.43×10⁵	9.54×10¹⁴	−6.56×10⁷
TNT	4	1.95×10⁵	1.59×10¹⁵	1.26×10⁵
	5	1.60×10⁵	1.96×10¹²	−3.40×10⁵
	6	1.47×10⁵	2.39×10¹¹	−3.40×10⁵

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表 3 JP-8燃料的燃烧参数

Table 3. Combustion parameters of JP-8 fuel

$\Delta H/\text{(J}\cdot {\text{kg} }{^{ {-1} }})$	$ \alpha $	$\dot{Q}/(\text{kW}\cdot{\text{m} }{^{ {-2} }})$	ρ/(g·cm⁻³)
43000	1000	1600	0.81

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表 4 烤燃弹放置高度不同时各表面的温度

Table 4. Temperatures of each surfaces at different heights of the cook-off bomb

Height/m	Temperature/℃
Height/m	Surface1	Surface 2	Surface 3	Surface 4	Surface 5	Surface 6
0.33	797.5	772.9	804.4	776.3	764.2	765.4
0.36	805.4	766.8	799.0	759.3	764.4	767.3
0.39	817.1	771.8	798.5	749.6	754.9	756.8
0.42	842.4	769.5	791.9	751.1	736.5	755.4

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表 5 烤燃弹放置高度不同时各表面的热通量

Table 5. Heat flux of each surface of the cook-off bomb with different heights

Height/m	${\dot q''_{\rm {tot} } }$/(kW·m⁻²)
Height/m	Surface 1	Surface 2	Surface 3	Surface 4	Surface 5	Surface 6
0.33	78.9	73.4	80.2	74.5	71.2	71.6
0.36	80.6	71.3	78.2	70.0	71.4	72.0
0.39	84.0	72.8	78.3	67.9	69.4	69.6
0.42	92.1	73.1	76.8	68.9	65.3	69.5

Height/m	${\dot q''_{\rm {rad} } }$/(kW·m⁻²)
Height/m	Surface 1	Surface 2	Surface 3	Surface 4	Surface 5	Surface 6
0.33	74.8	67.6	76.5	68.7	65.9	66.2
0.36	76.9	66.0	74.9	64.4	65.9	66.6
0.39	80.4	67.3	74.9	62.1	63.8	63.9
0.42	88.2	66.8	73.2	62.5	59.6	63.7

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表 6 油池尺寸不同时烤燃弹各表面温度

Table 6. Each surface temperature of the bomb burned in the oil pool with different sizes

Oil pool size/ (mm×mm)	Area/m²	Surface temperature/℃
Oil pool size/ (mm×mm)	Area/m²	Surface 1	Surface 2	Surface 3	Surface 4	Surface 5	Surface 6
1500×1200	1.80	817.1	771.8	798.5	750.0	754.9	756.8
2100×1700	3.57	853.9	821.7	862.9	802.5	851.4	856.4
3000×2400	7.20	838.8	876.1	903.2	878.6	868.3	868.4

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表 7 油池尺寸不同时烤燃弹各表面热通量

Table 7. Heat flux of each surface of the bomb burned in the oil pool with different sizes

Oil pool size/ (mm×mm)	${\dot q''_{\rm {tot} } }$/( kW·m⁻²)
Oil pool size/ (mm×mm)	Surface 1	Surface 2	Surface 3	Surface 4	Surface 5	Surface 6
1500×1200	84.0	72.8	78.3	67.9	69.4	69.6
2100×1700	95.8	87.7	98.7	82.0	97.1	98.7
3000×2400	91.4	105.0	112.9	105.7	103.2	103.1

Oil pool size/ (mm×mm)	${\dot q''_{\rm {rad}} }$/( kW·m⁻²)
Oil pool size/ (mm×mm)	Surface 1	Surface 2	Surface 3	Surface 4	Surface 5	Surface 6
1500×1200	80.4	67.3	74.9	62.1	63.8	63.9
2100×1700	91.9	81.8	94.9	76.3	91.4	92.8
3000×2400	87.3	99.4	109.2	100.3	97.5	97.4

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