基于理想流体对称碰撞模型的爆炸焊接流场角变形计算  

Calculation of the Angle Deformation in Explosive Welding Based on the Ideal Fluid Model of Symmetrical Colliding

作　　者：张晓立[1,2] 王金相[1] 李晓杰[3] 刘家骢[2] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094 [2]南京理工大学化工学院工程力学系,江苏南京210094 [3]大连理工大学工程力学系,辽宁大连116024

出　　处：《高压物理学报》2009年第1期51-58,共8页Chinese Journal of High Pressure Physics

基　　金：兵器预研基金(62301110510);瞬态物理国家重点实验室基金(9140C3008030806);教育部新教师基金项目(200802881013);南京理工大学"百名优秀青年教师资助计划"项目

摘　　要：采用理想流体对称碰撞模型,分析了爆炸焊接流场中沿流线的物理变形,推导出了角变形的理论计算公式,并采用Visual C++语言对其进行了编程计算,获得了驻点近区角变形的大小及变化规律。结果表明,在驻点近区,沿来流至出流方向角变形逐步增大,其变化率在驻点附近最大;沿出流方向,给定碰撞角,角变形随来流速度的增加而增大;给定来流速度,角变形随碰撞角的增大而减小。从理论和实验方面,间接地将计算结果与前人的结论进行了对比验证,结果是一致的,以此为基础配合驻点近区的应变率场,讨论了其对爆炸焊接波状界面形成的影响。An ideal fluid model of symmetrical colliding was taken to analyze the physical deformation on streamlines in explosive welding,and a theoretical formula of the angle deformation was deduced. The language of Visual C＋＋ was adopted to make a program to calculate the angle deformation numerically. The size of the angle deformation is obtained as well as the change law of it. The result shows that, near the stagnation point, the angle deformation is always increasing along the coming fluid to the outing fluid, and the changing rate near the stagnation point is maximum. Along the outing fluid the angle deformation increases with the augment of the velocity at given impact angle,and decreases with the increasing of the impact angle at the given velocity. The contrast and verification of the calculated results are in agreement with the theory and the experiment of others＇ indirectly. Based on it, the influence on the formation of the wavy interface in explosive welding by the strain rate field near the stagnation point was discussed.

关 键 词：爆炸焊接 对称碰撞 驻点近区 流线 角变形 

分 类 号：O389[理学—流体力学] TG456.6[理学—力学]