近水面水下爆炸水柱形成实验研究  

Experimental study on water columns produced by near surface underwater explosion

作　　者：李梅[1] 王树山[1] 魏继锋[1] 仲霄[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《船舶力学》2013年第11期1229-1235,共7页Journal of Ship Mechanics

基　　金：国家重点实验室基金项目(YBKT09-07)

摘　　要：研究了近水面水下爆炸的水柱形态及其形成机理。进行了5种比例深度的水下爆炸实验,通过高速录像和同步冲击波压力测量,分别记录水柱形成过程和水下冲击波压力,两方面测试结果相互对照,分析不同比例深度的水柱形态及其形成机理。对于实验的5种比例深度,分别出现了喷射水柱、水射流和二次水冢等3种水柱形态,表明比例深度对水柱形态具有决定性影响。根据实验结果,发现水面形成水射流的比例因子存在一定取值范围,其上限值介于0.543和0.644之间,间接表明Blake准则关于水射流形成的临界比例因子可能偏小。The morphology and formation mechanism of water columns produced by near surface underwa ter explosion was studied. By using highspeed camera and synchronous measurement of shock wave pres sures, recording the forming process of water column and shock wave pressures, and contrasting those two results, the configuration and formation mechanism of water columns for five scaling depths underwater ex plosion experiments were analyzed. The 5 scaling depths experiments appeared 3 water column configu rations, including spray water column, jet and secondary water dome. The experimental results show that the scaling depths have decisive effects to the water column configuration, and the scaling factor of forming jet has a certain range, and the upper limit is between 0.543 and 0.644. The critical scaling factor to judge the appearance of Bjerknes or Buoyancy jet in Blake Criterion maybe a little smaller.

关 键 词：水下爆炸 水柱 水射流 比例深度 比例因子 

分 类 号：O383.1[理学—流体力学]