Experimental and simulation study of afterburning effect for blast load in confined cabin

Table 1. Experimental conditions
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Table 1. Experimental conditions
工况编号药量/g 气体环境药柱直径/mm
1 7.50 空气（含氧量21%） 20
2 11.25 20
3 15.00 25
4 22.50 25
5 30.00 30
6 7.50 氦气（含氧量2.2%） 20
7 11.25 20
8 15.00 25
9 22.50 25
10 30.00 30

Table 2. Comparison of quasi-static pressure and final deformation under different conditions
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Table 2. Comparison of quasi-static pressure and final deformation under different conditions
药量/g 准静态压力/kPa 增加量/kPa 增幅/%
空气环境氦气环境
7.50 360 260 100 38
11.25 448 286 162 57
15.00 521 337 184 55
22.50 690 425 265 62
30.00 817 510 307 60

Table 3. Combustion reactions and heat of combustion
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Table 3. Combustion reactions and heat of combustion
燃烧反应燃烧热/ (kJ·mol⁻¹)
C + O₂ → CO₂ 393.6
CO + 0.5O₂ → CO₂ 282.8
H₂ + 0.5O₂ → H₂O 241.8
CH₄ + 2O₂ → CO₂ + 2H₂O 800.0

Table 4. The JWL EOS parameters of explosive TNT
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Table 4. The JWL EOS parameters of explosive TNT
ρ/g·cm⁻³ A/GPa B/GPa R₁ R₂ w e₀/(MJ·m⁻³)
1.55 307 3.9 4.485 0.79 0.3 6 495

Table 5. The values of afterburning energy corresponding to different W

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Table 5. The values of afterburning energy corresponding to different W

药量/g	爆热^[29]/(MJ·kg⁻¹)	燃烧能量/(MJ·kg⁻¹)
药量/g	爆热^[29]/(MJ·kg⁻¹)	方法1	方法2	方法3
7.50	4.190	10.010	8.449	8.895
11.25	4.190	10.010	7.207	7.928
15.00	4.190	10.010	6.267	7.109
22.50	4.190	10.010	5.741	6.531
30.00	4.190	10.010	5.005	5.824

Table 6. The errors of quasi-static pressure between simulation and experiment

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Table 6. The errors of quasi-static pressure between simulation and experiment

药量/g	试验值/kPa	仿真值
药量/g	试验值/kPa	方法1/kPa	误差/%	方法2/kPa	误差/%	方法3/kPa	误差/%
7.50	360	365	1.4	339	−5.8	345	−4.1
11.25	448	467	4.3	404	−9.7	420	−6.2
15.00	521	578	11.0	468	−10.2	491	−5.7
22.50	690	810	17.4	619	−10.3	653	−5.3
30.00	817	1028	25.9	737	−9.7	778	−4.7

Table 7. Comparison of results corresponding to different specific heat ratio in method 2

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Table 7. Comparison of results corresponding to different specific heat ratio in method 2

	药量 /g	绝热指数γ_m	燃烧能量Q_ab/(MJ·kg⁻¹)	准静态压力仿真值/kPa	仿真值与试验值误差/%
第1组	7.50	1.395	8.449	339	−5.8
	11.25	1.392	7.207	404	−9.7
	15.00	1.388	6.267	468	−10.2
	22.50	1.382	5.741	619	−10.3
	30.00	1.377	5.005	737	−9.7
第2组	7.50	1.354	10.474	373	3.7
	11.25	1.350	8.929	441	−1.5
	15.00	1.348	7.739	511	−1.9
	22.50	1.345	6.981	673	−2.4
	30.00	1.344	5.988	793	−2.9

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Xuesen YUE, Hu ZHOU, Xiangshao KONG, Cheng ZHENG, Weiguo WU. Experimental and simulation study of afterburning effect for blast load in confined cabin[J]. Chinese Journal of Ship Research, 2023, 18(4): 223

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