The Quantitative Density Measurement of Unsteady Flow around the Projectile
The Quantitative Density Measurement of Unsteady Flow around the Projectile
复制标题
弹丸周围非定常流密度的定量测量
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
H. Nagai
中科院分区：
文献类型：
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作者：
Y. Hirose;Kazuki Ishikawa;Y. Ishimoto;T. Nagashima;M. Ota;S. Udagawa;T. Inage;Kazuki Fujita;H. Kiritani;Koji Fujita;K. Ohtani;H. Nagai
东北大学流体科学研究所在弹道靶场进行了球体非定常流场的三维密度测量。在靶场试验舱内安装了利用12台数码相机同时进行多角度测量的系统，实现了三维密度的测量。利用彩色网格背景的彩色网格背景定向纹影（CGBOS）技术进行密度重建。球体的马赫数设置为1.5。同时，为了捕捉飞行球周围的非定常流场，在实验室中还安装了短脉冲LED来照亮背景。成功地重建了球体周围的三维密度分布。
Three-dimensional density measurement of unsteady flow field around a sphere is carried out in the ballistic range at Institute of Fluid Science, Tohoku University. Simultaneous multi-angle measurement system using twelve digital cameras is installed in the test chamber of the ballistic range to achieve the three-dimensional density measurement. The Colored-Grid Background Oriented Schlieren (CGBOS) technique using colored-grid background is utilized for the reconstruction of density. The Mach number of the sphere is set to 1.5. The short pulse LEDs to illuminate the backgrounds are also installed in the chamber to capture the unsteady flow field around a flying sphere. Three-dimensional density distribution around a sphere is successfully reconstructed.