圆柱型边界条件下多股燃气射流扩展形态的数值模拟
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摘要
以整装式液体发射药火炮为背景,从气液两相湍流掺混出发,研究燃烧稳定性的方法。设计圆柱型观察室,采用数值模拟方法,基于流体动力学理论,分别模拟六股和八股燃气射流在圆柱型边界条件下的扩展。通过追踪燃气空腔的扩展,获得了射流场两相分布、流线分布及压力分布。模拟结果表明:2种工况下燃气射流的轴向位移相似,六股燃气射流外轮廓更为光滑,其径向发展强于八股燃气射流。八股燃气射流相互干涉对流场的影响较为剧烈,湍流掺混明显。2种工况下径向压力分布对比明显,轴向压力分布相似。
In the context of a self-contained liquid propellant gun,the method of combustion stability was studied starting from the gas-liquid two-phase turbulent blending. The cylindrical observation chamber was designed. Based on fluid dynamics theory,the numerical simulation method was used to simulate the expansion of six gas-jets and eight gas-jets under cylindrical boundary conditions. By tracking the expansion of the gas cavity,the two-phase distribution,streamline distribution and pressure distribution of the jet field were obtained. The simulation results show that the axial displacement of the gas jet is similar under the two conditions,and the outer contour of the six gas-jets is smoother,and its radial development is stronger than that of the eight gas-jets. The interference of the eight gas-jets on the flow field is more severe,and the turbulent mixing is obvious. The radial pressure distribution is obvious under two conditions,and the axial pressure distribution is similar.
In the context of a self-contained liquid propellant gun,the method of combustion stability was studied starting from the gas-liquid two-phase turbulent blending. The cylindrical observation chamber was designed. Based on fluid dynamics theory,the numerical simulation method was used to simulate the expansion of six gas-jets and eight gas-jets under cylindrical boundary conditions. By tracking the expansion of the gas cavity,the two-phase distribution,streamline distribution and pressure distribution of the jet field were obtained. The simulation results show that the axial displacement of the gas jet is similar under the two conditions,and the outer contour of the six gas-jets is smoother,and its radial development is stronger than that of the eight gas-jets. The interference of the eight gas-jets on the flow field is more severe,and the turbulent mixing is obvious. The radial pressure distribution is obvious under two conditions,and the axial pressure distribution is similar.
引文
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[9] 赵嘉俊,余永刚.锥形多股火药燃气射流与液体工质相互作用的实验研究[J].含能材料,2015,23(11):1055-1060.ZHAO Jiajun,YU Yonggang.Interaction between cone-shaped multiple combustion gas jets and liquid[J].Chinese Journal of Energetic Materials,2015,23(11):1055-1060.(in Chinese)
[10] 赵嘉俊,余永刚.侧喷孔分布对多股燃气射流在充液室中扩展特性的影响[J].工程力学,2017,34(7):241-248.ZHAO Jiajun,YU Yonggang.Effects of the distribution of lateral orifices on espansion of multiple combustion gas jets in water-filled-chamber[J].Engineering Mechanics,2017,34(7):241-248.(in Chinese)
[11] DESPIRITO J.CFD analysis of the interior ballistics of the bulk-load liquid propellant[R].Lake Buena Vista,FL:AIAA,1996.
[12] DESPIRITO J.Interior ballistic simulations of the bulk-loaded liquid propellant gun:ARL-TR-2316[R].2001.
[13] XUE Xiaochun,YU Yonggang,ZHANG Qi.Study on expansion characteristic of twin combustion gas jets in five-stage cylindrical stepped-wall observation chamber[J].Flow,Turbulence and Combustion,2013,91(1):139-155.
[14] XUE Xiaochun,YU Yonggang,ZHANG Qi.Study on the effect of distance between the two nozzle holes on interaction of high pressure combustion-gas jets with liquid[J].Energy Conversion and Management,2014,85(9):675-686.
[2] SHAMBELAN C.The liquid monopropellant gun program at Frankford Arsenal[C]//Proceedings of the 6th Annual Conference on the Application of Liquid Propellants to Guns.Pittsburgh:Army Pittman-Dunn Labs,1955:1-26.
[3] TALLEY R L,BRACUTI A.Diagnostics of combustion evolutionin a bulk-loaded LP guns:A10-02-90[R].1990.
[4] KNAPTON J D,STOBIE I C,COOK D C,et al.Multi-point ignitionstudies in bulk-loaded propellant charges[C]//Proceedings of the 14th International Symposium on Ballistics,Quebec,Canada:IBC,1993:193-201.
[5] 齐丽婷,余永刚,彭志国,等.边界形状对气液相互作用过程的影响[J].弹道学报,2008,20(1):5-10.QI Liting,YU Yonggang,PENG Zhiguo,et al.Influence of boundary shape on interaction process of gas and liquid[J].Journal of Ballistics,2008,20(1):5-10.(in Chinese)
[6] 莽珊珊,余永刚.高压热气流与整装式液体工质相互作用的实验研究[J].工程热物理学报,2009,30(12):2017-2020.MANG Shanshan,YU Yonggang.Experimental study on the interaction of high-pressure hot gas jet with bulk-loaded liquid[J].Journal of Engineering Thermophysics,2009,30(12):2017-2020.(in Chinese)
[7] 薛晓春,余永刚,张琦.双股燃气射流在充液室内扩展特性的实验研究[J].爆炸与冲击,2013,33(5):449-455.XUE Xiaochun,YU Yonggang,ZHANG Qi.Experimental study on expansion characteristics of twin combustion-gas jets in liquid-filled chambers[J].Explosion and Shock Waves,2013,33(5):449-455.(in Chinese)
[8] HU Zhitao,YU Yonggang.Expansion characteristics of multiple wall jets in cylindrical observation chamber[J].Applied Thermal Engineering,2017,113:1396-1409.
[9] 赵嘉俊,余永刚.锥形多股火药燃气射流与液体工质相互作用的实验研究[J].含能材料,2015,23(11):1055-1060.ZHAO Jiajun,YU Yonggang.Interaction between cone-shaped multiple combustion gas jets and liquid[J].Chinese Journal of Energetic Materials,2015,23(11):1055-1060.(in Chinese)
[10] 赵嘉俊,余永刚.侧喷孔分布对多股燃气射流在充液室中扩展特性的影响[J].工程力学,2017,34(7):241-248.ZHAO Jiajun,YU Yonggang.Effects of the distribution of lateral orifices on espansion of multiple combustion gas jets in water-filled-chamber[J].Engineering Mechanics,2017,34(7):241-248.(in Chinese)
[11] DESPIRITO J.CFD analysis of the interior ballistics of the bulk-load liquid propellant[R].Lake Buena Vista,FL:AIAA,1996.
[12] DESPIRITO J.Interior ballistic simulations of the bulk-loaded liquid propellant gun:ARL-TR-2316[R].2001.
[13] XUE Xiaochun,YU Yonggang,ZHANG Qi.Study on expansion characteristic of twin combustion gas jets in five-stage cylindrical stepped-wall observation chamber[J].Flow,Turbulence and Combustion,2013,91(1):139-155.
[14] XUE Xiaochun,YU Yonggang,ZHANG Qi.Study on the effect of distance between the two nozzle holes on interaction of high pressure combustion-gas jets with liquid[J].Energy Conversion and Management,2014,85(9):675-686.