| LDV在静态混合器流场测量中的误差放大现象 |
| |
| 引用本文： | 张春梅,吴剑华,徐飞,龚斌.LDV在静态混合器流场测量中的误差放大现象[J].实验流体力学,2009,23(2):78. |
| |
| 作者姓名： | 张春梅 吴剑华 徐飞 龚斌 |
| |
| 作者单位： | 天津大学化工学院,天津,300072 |
| |
| 摘 要： | LDV在静态混合器流场测量中,测得速度由非正交坐标系向三维笛卡尔坐标系变换时将引起测量原始误差被放大.结合误差传递的原理对该现象进行了理论上的研究,并通过实验测量和数值模拟对研究结论进行了验证.结果表明:LDV在测量中的速度方向转换能引起测量原始误差在某方向速度值中被放大;放大倍数与用来测速的两束光之间夹角有很大关系,当夹角较小时,原始误差会被放大十几倍甚至几十倍,且夹角越小,放大倍数越大.
|
| 关 键 词： | 激光多普勒测速仪 静态混合器 速度测量 误差分析 |
Error amplification phenomenon of flow field measured by LDV in static mixer |
| |
| ZHANG Chun-mei,WU Jian-hua,XU Fei,GONG Bin.Error amplification phenomenon of flow field measured by LDV in static mixer[J].Experiments and Measur in Fluid Mechanics,2009,23(2):78. |
| |
| Authors: | ZHANG Chun-mei WU Jian-hua XU Fei GONG Bin |
| |
| Institution: | 1.Chemical Tehnology College;Tianjin University;Tianjin 300072;China;2.Shenyang Institute of Chemical Technology;Shenyang 110142;China |
| |
| Abstract: | The original error will be amplified by transformation from non-orthogonal coordinates of explorers to Cartesian coordinates during velocity measurement of static mixer's flow field by LDV.The phenomenon was studied theoretically based on the error transfer principle.The conclusion was verified by experimental measurement and numerical simulation.The results show that the value of velocity in some direction is amplified based on LDV measurement when velocity direction transformation.There is a direct connec... |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《实验流体力学》浏览原始摘要信息 |
| 点击此处可从《实验流体力学》下载免费的PDF全文 |
|
