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液体爆炸分散 冲击波 |
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反射稀疏波 界面破碎 |
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图像处理 分形维数 |
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李磊 |
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董玉才 |
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徐胜利 |
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任晓冰 |
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刘庚冉 |
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液体爆炸分散过程中界面破碎的实验研究
李磊①, 崔箭②, 董玉才①, 徐胜利③, 任业军①, 任晓冰①, 刘庚冉③
① 清华大学航天航空学院, 北京 100084;
② 中央民族大学传统医学研究院, 北京 100081;
③ 中国科学技术大学近代力学系, 合肥 230026
设计了一种有上下平面约束的液体爆炸分散装置, 通过阴影照相获得气液界面破碎形态变化的时间序列, 并应用平面激光诱导荧光(PLIF)得到了径向膨胀液体环内诱导的荧光照片. 采用二维图像处理、分形几何和数值模拟相结合的方法, 较系统地分析了实验结果. 最后, 讨论了液体环及其气液界面运动数学模型建立中的问题.
Experimental investigations to the interfaces breakup during liquid explosive disseminations process
1 School of Aerospace, Tsinghua University, Beijing 100084, China;
2 Traditional Medical Center, The Central University for Nationalities, Beijing 100081, China;
3 Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China
1 School of Aerospace, Tsinghua University, Beijing 100084, China;
2 Traditional Medical Center, The Central University for Nationalities, Beijing 100081, China;
3 Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China
An experimental device for the liquid explosive disseminations with constraints formed by up and down plains was set up. Applying the shadow photograph technology, the time series about the breakup shape of liquid-air interfaces were recorded. And using the PLIF (planar laser induced fluorescence) technology, the fluorescence photos about liquid shell expanding in radial direction were obtained. By means of digital image processing, fractal geometry and numerical simulation methods, systematic analyses to the experimental results were made. Finally some problems about how to establish the mathematical models for describing the unsteady motion of liquid shell and liquid-gas interfaces were discussed.
国家自然科学基金面上项目(批准号: 10572149)和中国工程物理研究院与国家自然科学基金委联合基金重点项目(批准号: 10676120)资助