Development of quasi common path phase-shifting interferometer for measurement of natural convection fields
Development of quasi common path phase-shifting interferometer for measurement of natural convection fields
复制标题
自然对流场测量准共路径相移干涉仪的研制
DOI：
10.1016/j.ijheatmasstransfer.2012.07.039
复制
发表时间：
2012
影响因子：
5.2
通讯作者：
and S. Maruyama
中科院分区：
文献类型：
--
作者：
E. Shoji;A. Komiya;J. Okajima;and S. Maruyama
提出了一种用于对流测量的准共光路相移干涉仪。该干涉仪具有直径约为100 mm的大测量区域，可以可视化自然对流的空间结构。它还具有准公共路径以减少空气扰动和振动的影响。此外，还引入了相移技术来提高干涉仪的相位分辨率和空间分辨率。利用该干涉仪测量了瑞利数为1.9× 106 ~ 3.0× 106的竖直平板周围的自然对流场，并估算了温度分布。得到的温度分布进行了比较与分析解决方案。此外，三维热边界层的影响进行了研究。为了验证干涉仪的能力，实验结果与计算结果进行了比较，在测试光束的光路长度的变化。结果表明，准共路相移干涉仪可以在高相位分辨率和高空间分辨率下精确测量光路长度变化。
A quasi common path phase-shifting interferometer for convection measurement was developed in this paper. This interferometer has a large measurement area of approximately 100mm in diameter to visualize the spatial structure of natural convection. It also has a quasi common path to reduce the effects of air disturbance and vibration. In addition, a phase-shifting technique is introduced to improve the interferometer’s phase resolution and spatial resolution. Natural convection fields around a vertical flat plate with Rayleigh numbers from 1.9×106to 3.0×106were measured and the temperature profiles were estimated by the interferometer. The obtained temperature profiles were compared with the analytical solutions. Moreover, the three-dimensional effect of a thermal boundary layer was investigated. To validate the interferometer’s capability, the experimental results were compared with the calculated results in terms of changes in the optical path length of the test beam. It was confirmed that the quasi common path phase-shifting interferometer can measure the optical path length change accurately at high phase and spatial resolutions.