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摘要: 采用TAB模型，基于气-粒两相流程序对液态金属铅颗粒在氦气中的破碎过程进行了分析，获得了破碎特征时间、破碎后颗粒尺度等关键力学量；并对充气微喷射实验进行了数值模拟，考虑颗粒破碎效应后的模拟结果与实验结果较好符合。结果证实了充气条件下液态金属颗粒的再次破碎现象，可加深认识微喷混合的物理规律。Abstract: Ejecta mixing takes place at the meta-gas interface under strong shock, where the breakup of ejected particles is a very important affecting factor. By adopting Taylor analogy breakup (TAB) model, the breakup effect of the melted lead on its transportation in helium gas was analyzed. The calculation adopted the two-phase flow (including gas and particle) numerical program. From the simulation results, some significant mechanical quantities were obtained, including the breakup time and sizes of the ejected particles. Meantime, the lead ejecta mixing process was simulated considering that the particle breakup was consistent with the experiments. These results give some important references in understanding the process of ejecta mixing.
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Key words:
- fluid mechanics /
- drop breakup /
- TAB model /
- two-phase flow /
- ejecta mixing /
- ejection
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图 2 恒定流场中颗粒运动的解析分析
Figure 2. Analysis of particles' movement in the constant flow field
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[1] Zellner M B, Mcneil W V, Hammerberg J E, et al. Probing the underlying physics of ejecta production from shocked Sn samples[J]. Journal of Physics, 2008, 103(12): 123502. doi: 10.1063/1.2939253 [2] Buttler W T, Oró D M, Preston D, et al. The study of high-speed surface dynamics using a pulsed proton beam[C]//Elert M L, Buttler W T, Borg J P, et al. Shock Compression of Condensed Matters-2011. Chicago, USA, 2011: 999-1002. [3] 王裴, 孙海权, 邵建立, 等.微喷颗粒与气体混合过程的数值模拟研究[J].物理学报, 2012, 61(23): 234703. doi: 10.7498/aps.61.234703Wang Pei, Sun Hai-quan, Shao Jian-li, et al. Numerical simulation on mixing process of ejecta and gas[J]. Acta Physica Sinica, 2012, 61(23): 234703. doi: 10.7498/aps.61.234703 [4] 刘静, 许旭.超声速横向气流中燃料雾化的数值模拟[J].北京航空航天大学学报, 2010, 36(10): 1166-1170.Liu Jing, Xu Xu. Numerical simulation of atomization of liquid jet in supersonic cross flow[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(10): 1166-1170. [5] Djavareshkian M H, Ghasemi A. Investigation of jet breakup process in diesel engine spray modeling[J]. Journal of Applied Sciences, 2009, 9(11): 2078-2087. doi: 10.3923/jas.2009.2078.2087 [6] Fakhari A, Rahimian M H. Investigation of deformation and breakup of a moving droplet by the method of lattice Boltzmann equations[J]. International Journal for Numerical Methods in Fluids, 2010, 64(8): 827-849. doi: 10.1002/fld.2172 [7] O'Rouke P J, Amsden A A. The TAB method for numerical calculation of spray droplet breakup[R]. SAE Technical Paper 872089, 1987. [8] Reitz R, Diwakar R. Structure of high-pressure fuel spray[R]. SAE Technical Paper 870598, 1987. [9] Oró D M, Hammerberg J E, Buttler W T, et al. A class of ejecta transport test problems[C]//Elert M L, Buttler W T, Borg J P, et al. Shock Compression of Condensed Matters-2011. Chicago, USA, 2011: 1351-1354. [10] 刘大有.二相流体动力学[M].北京: 高等教育出版社, 1993: 55-60. [11] 孙海权, 王裴.微喷混合问题的初步研究[J].计算力学学报, 2011, 28(增刊): 90-92. http://www.cqvip.com/QK/94820A/2011b04/37826417.htmlSun Hai-quan, Wang Pei. Research of shock induced matter ejection into gas[J]. Chinese Journal of Computational Mechanics, 2011, 28(suppl): 90-92. http://www.cqvip.com/QK/94820A/2011b04/37826417.html [12] 王裴, 孙海权, 邵建立, 等.微喷颗粒与气体混合过程的数值模拟研究[J].物理学报, 2012, 61(23): 234703. doi: 10.7498/aps.61.234703Wang Pei, Sun Hai-quan, Shao Jian-li, et al. Numerical simulation on mixing process of ejecta and gas[J]. Acta Physica Sinica, 2012, 61(23): 234703. doi: 10.7498/aps.61.234703 -
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