液滴对爆炸冲击波的衰减作用

刘贵兵; 侯海量; 朱锡; 张国栋

doi:10.11883/1001-1455(2017)05-0844-09

液滴对爆炸冲击波的衰减作用

doi: 10.11883/1001-1455(2017)05-0844-09

刘贵兵^{1, 2},
侯海量^1, ,,
朱锡¹,
张国栋¹

1.
海军工程大学舰船工程系，湖北武汉 430033
2.
中国人民解放军92941部队，辽宁葫芦岛 125001

基金项目:

国家自然科学基金项目 51209211

国家自然科学基金项目 51479204

详细信息

作者简介:
刘贵兵(1992—)，男，硕士研究生

通讯作者:
侯海量, hou9611104@163.com

中图分类号: O344.7
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- 被引次数: 0
出版历程
- 收稿日期: 2016-01-25
- 修回日期: 2017-07-08
- 刊出日期: 2017-09-25

Attenuation of shock wave passing through liquid droplets

Liu Guibing^{1, 2},
Hou Hailiang^{1
, ,},
Zhu Xi¹,
Zhang Guodong¹

1.
Department of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China
2.
Unit 92941 of Chinese People's Liberation Army, Huludao 125001, Liaoning, China

摘要

摘要: 为分析液滴对舰船舱内爆炸冲击波的耗散与衰减作用，通过有限元分析方法，建立冲击波作用于不同尺寸单个液滴和多排液滴的模型，分析冲击波与单个及多个液滴的作用过程及液滴形态变化，对冲击波衰减规律进行分析总结。得到结论如下：单个液滴模型中，小液滴破碎更迅速，破碎的规律性强；大液滴抛撒现象发生较早，抛撒出的小液滴数目多，但整体变化规律性偏差；不同尺寸单个液滴对冲击波有一定的衰减作用，衰减率随液滴尺寸增大而增大，线性规律较明显；成排液滴对冲击波有明显的衰减作用，相同液滴密度下衰减率随着液滴数量的增多而增大，呈现明显的线性特性。
- 冲击波 /
- 液滴破碎 /
- 比冲量 /
- 环流
Abstract: To characterize the function of water droplets in the restraining and attenuation of the explosive shock wave inside of a cabin, we built several models of a sing layer in z-axis with different sizes of a single droplet and rows of droplets using numerical simulation, analyzed the shock wave interacting with them, observed the interaction process and the change of the droplet forms, summarized the shock wave's attenuation regularities, and obtained some conclusions. The results show that, in the single droplet model, smaller droplets were broken more rapidly and regularly, while bigger droplets tend to break out little droplets more and earlier but less regularly on the whole; that single droplets of different sizes had an effect of attenuation on the shock wave, with an obvious correlation between the increase of the droplet size and that of the attenuation; and that the rows had the most obvious effect of attenuation on the shock wave, with a linear relation between the increase of the droplet number and that of attenuation effect at the same droplet density.
- shock wave /
- droplet broken /
- specific impulse /
- vortex pair

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图 1 水雾抑爆宏观模型

Figure 1. Macromodel of mist explosion suppression

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图 2 单个液滴微元模型

Figure 2. Micromodel of single droplet

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图 3 多排液滴模型

Figure 3. Micromodel of multi-row droplets

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图 4 各尺寸液滴5 μs时刻的压力场

Figure 4. Pressure waves of several droplets at 5 μs

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图 5 各尺寸液滴10 μs时刻的压力场

Figure 5. Pressure waves of several droplets at 10 μs

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图 6 各尺寸液滴15 μs时刻的压力场

Figure 6. Pressure waves of several droplets at 15 μs

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图 7 各尺寸液滴10 μs时刻的形态

Figure 7. Forms of several droplets at 10 μs

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图 8 各尺寸液滴的形态变化

Figure 8. Form change processes of several droplets

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图 9 测量的压力曲线

Figure 9. Measured pressure curves

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图 10 无液滴压力曲线

Figure 10. Pressure curves without droplet

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图 11 成排液滴的压力场变化

Figure 11. Pressure wave change processes of rows of droplets

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图 12 成排液滴的形态变化

Figure 12. Form change processes of rows of droplets

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图 13 测量的压力曲线

Figure 13. Measured pressure curves

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表 1 计算工况

Table 1. Working condition of calculations

r/m	m_e/kg	/(m·kg^-1/3)	Δp_m/MPa	t₊/ms	v/(m·s^-1)	Ma
2.0	100	0.431	5.821	4.113 2	2 350.5	6.913
0.2	0.1	0.431	5.821	0.411 3	2 350.5	6.913

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表 2 比冲量数据

Table 2. Data of specific impluse

t/μs	I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)
t/μs	1 mm		2 mm		4 mm		6 mm		8 mm		无液滴
25	32.21	0.21	30.81	4.55	28.63	11.29	26.60	17.58	24.33	24.61	32.28
30	44.85	2.83	43.24	6.32	40.46	12.34	38.08	17.49	35.35	23.40	46.15
35	54.11	2.11	52.09	5.77	49.32	10.78	47.07	14.84	43.94	20.51	55.28
40	61.06	0.71	59.23	3.67	56.73	7.75	54.40	11.54	51.27	16.63	61.49
40.8	61.97	0.57	60.31	3.24	57.81	7.24	55.49	10.98	52.62	15.57	62.33

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表 3 各模型衰减率

Table 3. Attenuation rate of models

t₊/μs	I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)
t₊/μs	1 mm		2 mm		4 mm		6 mm		8 mm		无液滴
40.8	261.07	0.14	259.41	0.77	256.91	1.73	254.59	2.62	251.72	3.71	261.43

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表 4 比冲量数据

Table 4. Data of specific impluse

t/μs	I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)
t/μs	1排		2排		3排		4排		无液滴
20	9.61	19.10	8.23	30.70	6.64	44.06	5.17	56.44	11.87
25	25.66	20.48	21.93	32.06	19.23	40.42	15.10	53.21	32.28
30	39.76	13.84	34.91	24.35	31.13	32.56	24.89	46.07	46.15
35	48.12	12.95	42.18	23.69	38.79	29.82	32.61	41.01	55.28
40	54.33	11.65	47.85	22.18	43.69	28.95	38.52	37.36	61.49

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表 5 各模型衰减率

Table 5. Attenuation rate of models

t₊/μs	I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)δ/%		I/(N·s·m^-2)
t₊/μs	1排		2排		3排		4排		无液滴
40	253.43	2.75	246.95	5.23	242.79	6.83	237.62	8.82	260.59

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