| 用数字化 M-Z 干涉仪对低密度混合流场测量的实验研究 |
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| 引用本文： | 刘文杰,俞刚.用数字化 M-Z 干涉仪对低密度混合流场测量的实验研究[J].实验流体力学,1991(2). |
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| 作者姓名： | 刘文杰 俞刚 |
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| 作者单位： | 中国科学院力学研究所
(刘文杰)，中国科学院力学研究所(俞刚) |
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| 摘 要： | 本文提出了最近研制成功的数字化 M-Z 干涉系统,并用它对二维低密度混合流场的密度场进行了测量。由于该系统采用了激光光源以及干涉图的计算机处理技术,使得实验和数据处理的工作自动化,而且具有精度高的特点,适用于低密度混合流场中较弱信号的高精度测量。文中系统地分析了用激光作光源的条件下,M-Z 干涉系统对平行光扩束系统的要求,以及如何消除因激光干涉性太强而引起的寄生干涉条纹,通过对平行式半透半反镜的分析,给出了适用于 M-Z 干涉仪的平行式半透半反镜的具体设计参数,并简述了由于使用激光光源而简化仪器调节的原理,给出了一种使经典 M-Z 干涉仪与现代计算机技术相结合来提高测量精度的新方法。
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| 关 键 词： | 数字化干涉仪 高精度 低密度流场 |
THE STUDY OF THE MEASUREMENT OF THE LOW DENSITY MIXING FLOW BY DIGITAL MACHZEHNDER INTERFEROMETER |
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| Liu Wenjie,Yu Gong.THE STUDY OF THE MEASUREMENT OF THE LOW DENSITY MIXING FLOW BY DIGITAL MACHZEHNDER INTERFEROMETER[J].Experiments and Measur in Fluid Mechanics,1991(2). |
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| Authors: | Liu Wenjie Yu Gong |
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| Abstract: | This paper posed a digital Mach-Zehnder interferometersystem newly developed tom easure the low density field of 2-D mixing flow.The adoption of laser as light source and the image computer automationprocessing system(ICAPS)made the experiment and data highly accu-rate.The system is suitable to high accuracy measurement for weaksignal in low density flow.The requirment of M-Z interferometer systemto the parallel expansion beam system and how to dispel the additionalinterferograms caused dy strong laser interference have been analyzedsystematically.The specific disign parameter of the parallel splittersuitable for M-Z interferometer has also been given here.The paperintroduced the simplified adjustment principle using the laser sourceand described the new accurate method of the combination of classi-cal M-Z interferometer and modern computer technique. |
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| Keywords: | digital interferometer high accuracy low density flow |
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