激光点火技术的实验研究和数值仿真  

Experimental Study and Numerical Simulation on Laser Ignition Processes

作　　者：张小兵[1] 袁亚雄[1] 杨均匀[1] 邹瑞荣[1] 

机构地区：[1]南京理工大学动力工程学院,江苏南京210094

出　　处：《兵工学报》2006年第3期533-536,共4页Acta Armamentarii

基　　金：国家自然科学基金资助项目(59976014);新世纪优秀人才支持计划资助(NCET-04-0509)

摘　　要：设计了多点均匀点火模拟装置。使用大功率Nd∶YAG激光器产生激光,通过光学玻璃窗和光纤把能量传到火药床中点燃火药,并在点火管内实现多点同时点火。把激光单点点火、不同直径光纤多点激光点火实验结果与普通的电点火进行了比较,发现前者能达到抑制膛内异常压力波的作用。建立了激光点火过程的两相流体力学数学物理模型,对激光点火过程进行了数值仿真,其结果与实验有较好的一致性。A multi-point laser ignition simulator was designed and multi-point uniform ignition experiments was conducted. With the high-power solid pulse laser, laser is produced and transmitted by optic glass window and optic fiber. The pressure history at four ports was detected. It is found that the pressure distributions are almost uniform and the pressure waves are small by 500 μm fiber and 900 μm fiber. The comparison of single point laser ignition and conventional electric primer indicates that laser simultaneous ignition is obvious and dangerous pressure waves are obviously restrained. A two-phase flow model of the multi-point laser ignition processes was established and numerically simulated. The numerical results are well consistent with those of the experiments.

关 键 词：爆炸力学 激光 点火 数值仿真 压力波 

分 类 号：TJ012.1[兵器科学与技术—兵器发射理论与技术]