多孔钢板对气相爆轰波传播影响的实验研究  

Experimental Study on Gaseous Detonation Propagation in a Perforated Steel Plate Section

作　　者：郭长铭[1] 陈志刚[1] 

机构地区：[1]中国科学技术大学力学和机械工程系,合肥230026

出　　处：《实验力学》2000年第4期400-407,共8页Journal of Experimental Mechanics

摘　　要：本实验旨在研究气相爆轰波在衬有多孔钢板的管道中传播的现象 .先是在光滑管壁的管道中产生稳定的具有胞格结构的爆轰波 ,然后让它通过专门设计的管壁上衬有多孔钢板的阻尼段 .利用压力传感器测量了氢氧混合气体爆轰波在阻尼段中的传播速度和爆压 .发现爆轰波在通过阻尼段时有先衰减后又加强的现象 .证实了多孔钢板等一类吸收材料既有吸收横波削弱爆轰波的作用 ,又有加强湍流使爆轰波得以恢复的作用 .文中对吸收材料的粗糙表面产生自发转换形成新的横波的机制进行了探讨 .The present experimental investigation attempts to understand the propagation of gaseous detonation waves in a section lined with perforated steel plate. A stable cellular detonation wave was generated firstly in tube with smooth walls. Then it would propagate through a specially designed section lined with perforated steel plate. Pressure transducers are used to measure the pressure and speed of detonation for 2H 2+O 2 gas mixture. It is discovered that the detonation wave is attenuated first by the perforated plate then is 'recovered'. The experimental results support the argument that the rough surface of absorbing materials, like perforated plate, wire mesh and steel wool, can attenuate detonation wave by means of 'absorbing' transverse waves, but on the other hand it also can strengthen greatly the scale of turbulence and make it sufficient to cause immediate spontaneous transition to detonation, i.e., spontaneous DDT. The mechanism to provide immediate spontaneous transition to detonation for rough surface of absorbing materials is explored here as well.

关 键 词：气相爆轰波 吸收材料 多孔钢板 传播 

分 类 号：O381[理学—流体力学] O382.1[理学—力学]