X光照相技术应用于果冻内爆实验的研究  

Experimental research on implosion of gelatin-ring using X-ray radiography

作　　者：钟杰[1] 叶雁[1] 黄文斌[1] 刘振清[1] 钱伟新[1] 李作友[1] 朱鹏飞[1] 王婉丽[1] 张振涛[1] 王晓[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《强激光与粒子束》2014年第3期210-213,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11202194);国防科技基础研究项目

摘　　要：果冻内爆实验是一种研究柱形汇聚条件下Rayleigh-Taylor不稳定性的实验方法,由于高速摄影图像不能分辨反弹阶段果冻内界面的扰动,因此采用中低能X光照相CCD相机接收技术开展果冻与气体混合区域的实验研究,获得了果冻环在不同时刻压缩、反弹的发展状况及其内外边界,并观测到果冻质量分数降低时果冻与气体混合界面的变化。实验结果表明:X光照相可作为测量湍流混合区域的半定量测试技术,有助于研究果冻内爆中的气液界面Rayleigh-Taylor不稳定性现象。Gelatin-ring experiment is a technique of studying Rayleigh-Taylor instability growth in a cylindrically convergent geometry.The customary measurement is the high-speed photography which is difficult to distinguish the turbulent mixing zone(TMZ).Therefore,the low and middle energy X-ray radiography system was conducted using the commercial flash X-ray tube and home-made camera.The evolutions of the gelatin-ring's inner and outer surfaces were clearly observed by X-ray radiography in different time and gelatin's concentration,including rebound of inner surface and turbulent mixing.The experimental results show that the process of the gelatin-ring's TMZ can be distinguished by X-ray radiography.Therefore,X-ray radiography is an effective diagnostic in the gelatin-ring implosion experiment.

关 键 词：X光照相 果冻内爆实验技术 RAYLEIGH-TAYLOR不稳定性 湍流混合区域 

分 类 号：O131.1[理学—数学] O363.2[理学—基础数学]