| 差分干涉CT技术诊断激波管界面不稳定性 |
| |
| 引用本文： | 刘寿先,陈光华,黄文斌,袁树云,王德田,李泽仁,彭其先.差分干涉CT技术诊断激波管界面不稳定性[J].强激光与粒子束,2012,24(7):1555-1560. |
| |
| 作者姓名： | 刘寿先 陈光华 黄文斌 袁树云 王德田 李泽仁 彭其先 |
| |
| 作者单位： | 1.中国工程物理研究院 流体物理研究所, 四川 绵阳 621 900 |
| |
| 基金项目： | 中国工程物理研究院科学技术发展基金 |
| |
| 摘 要： | 对差分干涉计算机层析技术诊断激波加载下气柱界面不稳定性的可行性进行初步理论和实验研究。针对有限投影数的联合代数重建算法，提出了一种新的投影矩阵计算方法，采用特定投影方向，各投影方向具有不同采样间隔。投影方向的对称性和投影线的规律性使计算过程大为减化。用该重建算法对气柱密度场进行数值模拟，结果表明4方向投影能够重建激波作用下气柱演化初期的体密度场，8方向投影基本能够重建演化中期的体密度场。用差分干涉系统对激波管气柱进行3方向诊断的实验结果表明，差分干涉计算机层析技术用于激波冲击下的气柱不稳定性密度场诊断是可行的。
|
| 关 键 词： | 界面不稳定性 差分干涉 计算机层析 气柱实验 激波管 |
| 收稿时间： | 2011/6/20 |
Diagnosis of Richtmyer-Meshkov instability in shock tube using shearing interferometric tomography |
| |
| Liu Shouxian
,
Chen Guanghua
,
Huang Wenbin
,
Yuan Shuyun
,
Wang Detain
,
Li Zeren
,
Peng Qixian.Diagnosis of Richtmyer-Meshkov instability in shock tube using shearing interferometric tomography[J].High Power Laser and Particle Beams,2012,24(7):1555-1560. |
| |
| Authors: | Liu Shouxian Chen Guanghua Huang Wenbin Yuan Shuyun Wang Detain Li Zeren Peng Qixian |
| |
| Affiliation: | 1.Institute of Fluid Physics,CAEP,P.O.Box 919-109,Mianyang 621900,China |
| |
| Abstract: | The paper presents the numerical and experimental study of shearing interferometric tomography for Richtmyer-Meshkov instability diagnosis. On the basis of simultaneous algebraic reconstruction technique (SART), a method is presented to compute the projection coefficient matrix using specific projection directions and different sampling interval for each direction. The symmetrical projection and projection ray regularity simplify the computing process of the conventional SART. The reconstruction of the density field of a gas cylinder was performed. The numerical results show that four-directional computer tomography(CT) can reconstruct the density field in the early stage of evolution and eight-directional CT has the maximal error less than 17% in the middle stage of evolution. Three shearing interferometers were used to measure the gas cylinder density in shock tube from three different directions. The phase distribution deduced from the interferograms basically coincides with the theoretical prediction. The results of numerical computation and experiment indicate that shearing interferometric tomography may be a useful tool for the study of Richtmyer-Meshkov instability. |
| |
| Keywords: | Richtmyer-Meshkov instability shearing interferometer computer tomography gas cylinder shock tube |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《强激光与粒子束》浏览原始摘要信息 |
|
点击此处可从《强激光与粒子束》下载全文 |
