| 关于粒子图像测速仪精度的数值测试 |
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| 引用本文： | 魏庆鼎,颜斌,陈军.关于粒子图像测速仪精度的数值测试[J].实验流体力学,2001,15(2):47-52. |
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| 作者姓名： | 魏庆鼎 颜斌 陈军 |
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| 作者单位： | 魏庆鼎（北京大学湍流研究国家重点实验室，北京
100871）
颜斌（北京大学湍流研究国家重点实验室，北京 100871）
陈军（北京大学湍流研究国家重点实验室，北京 100871） |
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| 基金项目： | National Preselected
Climbing Projects;Natural Science Foundation of China (59895410) |
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| 摘 要： | 利用数值模拟的方法对粒子图像测速仪的精度问题进行了数值实验。速度场是通过对一个片光源上两次曝光的图像进行互相关处理来得到的。为了研究流体运动的不均匀性对于一个诊断区内速度矢量测量结果的影响，针对五种典型的不均匀性进行讨论。数值实验的结果表明有几种流体运动不均匀性会显著地影响这种粒子图像测速方法的精度。
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| 关 键 词： | 粒子图像测速仪 数值测试 速度测量 |
| 文章编号： | 1007-3124(2001)02-0047-06 |
| 修稿时间： | 2000年11月14 |
A numerical test on the
accuracy of particle image velocimetry |
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| WEI Qing-ding,YAN Bin,CHEN Jun.A numerical test on the
accuracy of particle image velocimetry[J].Experiments and Measur in Fluid Mechanics,2001,15(2):47-52. |
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| Authors: | WEI Qing-ding YAN Bin CHEN Jun |
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| Abstract: | A numerical test on the accuracy of the particle image velocimetry is conducted.It is assumed that the information of the particle image photographed by double exposure with a light sheet is processed by correlation method.In order to study the effect of non uniformity of fluid motion on determination of the velocity vector at an interrogation spot,five typical non uniform factors are discussed.A statistical method is used to get quantitative estimation.The results suggest that the accuracy of this PIV method is significantly affected by some factors of non uniform flow. |
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| Keywords: | particle image velocimetry numerical test velocity measurement |
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