| 利用光学层析技术重构超声速绕流流场密度分布 |
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| 引用本文： | 郭隆德,杨建军,吴运刚,谢伟明.利用光学层析技术重构超声速绕流流场密度分布[J].实验流体力学,2009,23(2). |
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| 作者姓名： | 郭隆德 杨建军 吴运刚 谢伟明 |
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| 作者单位： | 中国空气动力研究与发展中心,四川,绵阳,621000 |
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| 摘 要： | 在连续式风洞中,采用单光路旋转流场干涉测量和计算机层析方法获得了含模型的超声速绕流流场密度分布.首先利用多种图像处理方法,并引入计算机辅助功能,对干涉图片进行精确判读和定量处理,准确重构波前相位信息;获得了相应的PV值、RMS值以及前15阶的Zernike多项式系数;通过同原始CFD模型波前数据的对比,系统的重构精度RMS优于λ/10.在获得一系列单帧干涉波前相位数据的基础上,采用光学层析技术,设计计算机迭代算法,构造内部旋转矩阵,重构了超声速绕流流场密度分布,可以非常直观地获得待测流场不同方向截面上的密度分布状况.
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| 关 键 词： | 光学层析技术 超声速 流场 密度分布 |
Reconstruction of density distribution in the supersonic flow field with optical computerized tomography |
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| GUO Long-de,YANG Jian-jun,WU Yun-gang,XIE Wei-ming.Reconstruction of density distribution in the supersonic flow field with optical computerized tomography[J].Experiments and Measur in Fluid Mechanics,2009,23(2). |
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| Authors: | GUO Long-de YANG Jian-jun WU Yun-gang XIE Wei-ming |
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| Institution: | China Aerodynamics Research and Development Center;Mianyang Sichuan 621000;China |
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| Abstract: | The density distribution of supersonic flow field including model in the wind tunnel have been reconstructed.The interferometry and optical computerized tomography have been used to accomplish this task.Firstly,several image processing methods and computer aided identify have been programmed to accurately distinguish and quantificationally calculate the interference patterns.It's very important that the wave-front information has been reconstructed accurately.The correlative parameters including PV,RMS,and ... |
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| Keywords: | optical computerized tomography supersonic flow field density distribution |
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