Numerical simulation of gasoline-air thermal ignition induced by continuous hot wall
-
摘要: 为了对油气在持续热壁下热着火发生过程进行数值模拟，耦合化学动力学模型、流体动力学模型及辐射传热模型，建立了油气热着火的统一模型。基于实验工况，模拟了受限空间中油气在持续热壁条件下热着火发生过程，并分析了温度、压力流场的演变特征，以及不同位置处温度、压力、层流速度、湍流速度和组分质量分数的变化曲线。通过模拟，发现油气热着火过程存在3个阶段，分别为加热初始阶段、加热中间阶段和热着火发生阶段。不同阶段存在的主要原因是化学反应和流动的主导作用不同。Abstract: In order to simulate the thermal ignition process of gasoline-air in continuous hot wall, the chemical kinetic model, hydrodynamic model and radiation heat transfer model were coupled to establish a unified model of gasoline-airthermal ignition. According to the working condition of the experiment, the occurrence process of gasoline-air thermal ignition was simulated under the conditions of high temperature induced by continuous hot wall in confined space. Flow field evolution characteristics of the temperature and the pressure were analyzed. The variation curves of temperature, pressure, flow velocity, turbulent velocity and group concentration were obtained at different positions. By simulation, it is found that there are three stages in the process of gasoline-air thermal ignition, namely, the initial heating stage, the heating intermediate stage and the thermal ignition stage. The main reason for the existence of different stages is that the leading roles of chemical reaction and flow are different.
-
Key words:
- gasoline-air /
- unified model /
- thermal ignition /
- continuous hot wall /
- chemical kinetic /
- hydrodynamic /
- radiation heat transfer
-
图 3 热着火发生时热壁表面的临界温度
Figure 3. Critical temperature of the hot wall surface when thermal ignition occurs
图 4 油气热着火温度场模拟图
Figure 4. Simulated temperature-field diagrams of gasoline-air thermal ignition
图 14 初始阶段横轴方向火焰速度变化曲线
Figure 14. Velocity of the flame in x direction at initial stage
图 15 发生阶段横轴方向火焰速度变化曲线
Figure 15. Velocity of the flame in x direction at occurrence stage
图 16 初始阶段纵轴方向火焰速度变化曲线
Figure 16. Velocity of the flame in y direction at initial stage
图 17 发生阶段纵轴方向火焰速度变化曲线
Figure 17. Velocity of the flame in y direction at occurrence stage
表 1 初始组分
Table 1. Initial components
初始组分 质量分数 摩尔分数 摩尔浓度/(mol·cm-3) CH4 0.01 0.018 2 7.45×10-7 C2H6 0.01 0.009 7 3.98×10-7 C3H8 0.01 0.006 6 2.71×10-7 C4H10 0.01 0.005 0 2.05×10-7 n-C7H16 0.01 0.002 9 1.19×10-7 i-C8H18 0.01 0.002 6 1.04×10-7 O2 0.21 0.192 1 7.85×10-6 N2 0.73 0.763 0 3.12×10-5 
下载: 导出CSV
表 2 热着火过程的6个时间点的基本参数
Table 2. Basic parameters of the thermal ignition process at 6 time points
时间点 t/ms n Tmax/K pmax/Pa vx, max/(m·s-1) vy, max/(m·s-1) I/% No.1 100.09 10 000 452.12 10 484.3 4.93 4.76 280.551 No.2 413.06 63 000 581.78 92 218.8 66.89 52.59 2 435.931 No.3 413.53 64 800 844.91 127 912.0 109.51 55.40 2 812.672 No.4 413.53 80 000 872.86 144 851.9 100.20 42.66 2 266.638 No.5 413.53 100 000 914.99 179 834.6 99.01 40.38 2 195.186 No.6 414.06 587 200 1271.99 381 857.6 306.55 142.44 14 418.030
下载: 导出CSV
-
[1] MEHL M, PITZ W J, WESTBROOK C K, et al. Kinetic modeling of gasoline surrogate components and mixtures under engine conditions[J]. Proceedings of the Combustion Institute, 2011, 33(1):193-200. doi: 10.1016/j.proci.2010.05.027 [2] BATTIN-LECLERC F. Detailed chemical kinetic models for the low-temperature combustion of hydrocarbons with application to gasoline and diesel fuel surrogates[J]. Progress in Energy and Combustion Science, 2008, 34(4):440-498. doi: 10.1016/j.pecs.2007.10.002 [3] CANCINO L R, FIKRI M, OLIVEIRA A A M, et al. Ignition delay times of ethanol-containing multi-component gasoline surrogates:Shock-tube experiments and detailed modeling[J]. Fuel, 2011, 90(3):1238-1244. doi: 10.1016/j.fuel.2010.11.003 [4] DU Yang, ZHANG Peili, OU Yihong. Effects of humidity, temperature and slow oxidation reactions on the occurrence of gasoline-air explosions[J].Journal of Fire Protection Engineering, 2013, 23(3):226-238. doi: 10.1177/1042391513486464 [5] 欧益宏, 杜扬, 蒋新生, 等.地下坑道瓦斯热着火实验研究[J].煤矿安全, 2011, 42(2)4-7. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=mkaq201102002OU Yihong, DU Yang, JIANG Xinsheng, et al. Experiment research on thermal ignition of gas in underground tunnel[J]. Safety in Coal Mines, 2011, 42(2):4-7. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=mkaq201102002 [6] 杜扬, 欧益宏, 吴英, 等.热壁条件下油气的热着火现象[J].爆炸与冲击, 2009, 29(3):268-274. doi: 10.11883/1001-1455(2009)03-0268-07DU Yang, OU Yihong, WU Ying, et al. Thermal ignition phenomena of gasoline-air mixture induced by hot wall[J]. Explosion and Shock Waves, 2009, 29(3):268-274. doi: 10.11883/1001-1455(2009)03-0268-07 [7] OU Yihong, DU Yang, JIANG Xinsheng, et al. Study on the thermal ignition of gasoline-air mixture in underground oil depots based on experiment and numerical simulation[J]. Journal of Thermal Science, 2010, 19(2):173-181. doi: 10.1007/s11630-010-0173-7 [8] BI Mingshu, DONG Chengjie, ZHOU Yihui. Numerical simulation of premixed methane air deflagration in large L/D closed pipes[J]. Applied Thermal Engineering, 2012, 40:337-342. doi: 10.1016/j.applthermaleng.2012.01.065 [9] WANG Cheng, HAN Wenhu, NING Jianguo, et al. High resolution numerical simulation of methane explosion in bend ducts[J]. Safety Science, 2012, 50(4):709-717. doi: 10.1016/j.ssci.2011.08.047 [10] SKJOLD T, ARNTZEN B J, HANSEN O R, et al. Simulation of dust explosions in complex geometries with experimental input from standardized tests[J]. Journal of Loss Prevention in the Process Industries, 2006, 19(2/3):210-217. https://www.sciencedirect.com/science/article/pii/S0950423005000689 [11] SARLI V, BENEDETTO A, RUSSO G. Using Large Eddy Simulation for understanding vented gas explosions in the presence of obstacles[J]. Journal of Hazardous Materials, 2009, 169(1/2/3):435-442. https://www.researchgate.net/publication/24396517_Using_Large_Eddy_Simulation_for_understanding_vented_gas_explosions_in_the_presence_of_obstacles [12] 吴松林, 杜扬, 李国庆, 等.受限空间油气热着火的简化机理与分析[J].燃烧科学与技术, 2015, 21(1):20-27. http://www.cqvip.com/QK/98306X/201501/663795215.htmlWU Songlin, DU Yang, LI Guoqing, et al. Reduced mechanism and analysis for thermal ignition of gasoline-air mixture in confined space[J]. Journal of Combustion Science and Technology, 2015, 21(1):20-27. http://www.cqvip.com/QK/98306X/201501/663795215.html [13] WU Songlin. Research on catastrophe phenomenon in the occurrence and the development of gasoline-air explosion on the local heat resource in confined space[D]. Chongqing, China: Logistical Engineering University, 2015: 13-40. 期刊类型引用(11)
1. 黄振贵，范浩伟，陈志华，周可，刘想炎，王浩. 空心弹高速入水机理及特性数值模拟研究. 爆炸与冲击. 2024(01): 117-131 . 
本站查看2. 张亮，胡常莉，吴小安. 超空泡航行体锥段结构对其尾拍运动影响的数值研究. 兵工学报. 2024(03): 828-836 . 
百度学术3. 刘喜燕，袁绪龙，罗凯，祁晓斌. 预置舵角对跨介质航行体入水尾拍运动影响试验. 兵工学报. 2023(06): 1632-1642 . 百度学术4. 刘喜燕，袁绪龙，罗凯，祁晓斌，鲁娜. 带尾裙跨介质航行体高速斜入水实验研究. 爆炸与冲击. 2023(11): 108-120 . 本站查看5. 王旭，吕续舰. 双球并联入水空化及运动特性实验研究. 振动与冲击. 2020(15): 221-229 . 百度学术6. 侯夏伊，胡俊，于勇. 不同空化模型对附着空化的数值模拟与评价. 兵工学报. 2020(S1): 91-96 . 百度学术7. 黄彪，黄瀚锐，刘涛涛，张孟杰，王国玉. 通气空泡流动特性研究现状及进展. 空气动力学学报. 2020(04): 724-745 . 百度学术8. 黄海龙，王聪，余德磊，张鹤，卢佳兴. 高速射弹并联入水过程空泡演化特性试验. 哈尔滨工业大学学报. 2020(12): 15-20 . 百度学术9. 肖海燕，罗松，朱珠，于勇. 高速射弹小角度入水弹道特性研究. 北京理工大学学报. 2019(08): 784-791 . 百度学术10. 朱珠，罗松，卢丙举，于勇. 旋转射弹高速倾斜入水多相流场与弹道数值模拟. 爆炸与冲击. 2019(11): 69-79 . 本站查看11. 黄彪，吴钦，王国玉. 非定常空化流动研究现状与进展. 排灌机械工程学报. 2018(01): 1-14 . 百度学术其他类型引用(6)
-
百度学术
计量
- 文章访问数: 4829
- HTML全文浏览量: 1890
- PDF下载量: 129
- 被引次数: 17