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双波长动态液膜厚度与温度同步测量系统

Simultaneous Measurement System of Thickness and Temperature of Two-Wavelength Dynamic Liquid Film

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摘要

基于半导体激光吸收光谱(DLAS)技术, 研制了双波长动态液膜厚度与温度高精度同步测量系统。利用标准具对该系统的测量精度进行验证。结果表明, 该系统的液膜厚度和温度的平均测量误差分别为4.58%和1.34%。在此基础上, 利用该系统对水平石英玻璃板上的液膜蒸发过程进行研究。结果表明, 液膜的平均蒸发速率为0.34 μm/s, 蒸发速率随液膜温度的升高而增大, 且DLAS与图像法和热电偶测得的结果吻合良好。利用该系统对流道中的动态液膜进行研究, 在不同液膜温度(308,315,323 K)下, 液膜平均厚度基本一致且在1 s内波动11次, 液膜温度几乎保持恒定。

Abstract

A simultaneous measurement system based on the diode-laser absorption spectroscopy (DLAS) technique is developed to simultaneously measure the thickness and temperature of a dynamic liquid film with high accuracy. The measurement accuracy of this system is validated by a calibration tool and the results show that the average measurement errors of film thickness and temperature are 4.58% and 1.34%, respectively. On this basis, this system is employed to study the evaporation process of the liquid film on a horizontal quartz glass plate and the results indicate that the average evaporation rate of this liquid film is 0.34 μm/s and the evaporation rate increases with the increase of film temperature. Moreover, the results by DLAS, imaging method and thermocouple are well consistent. In addition, the system is applied to the dynamic liquid film in a flow channel and the results disclose that under different film temperatures of 308, 315 and 323 K, the average thicknesses of the liquid film are basically consistent and they fluctuates for 11 times within one second, while the film temperature is almost constant.

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中图分类号:TK31

DOI:10.3788/cjl201946.0404011

所属栏目:测量与计量

基金项目:国家自然科学基金(51676130,51776129,51306123)

收稿日期:2018-12-18

修改稿日期:2019-01-09

网络出版日期:2019-01-18

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杨荟楠:上海理工大学能源与动力工程学院, 上海 200093
邓豪:上海理工大学能源与动力工程学院, 上海 200093
蒋永:上海理工大学能源与动力工程学院, 上海 200093
张月星:上海理工大学能源与动力工程学院, 上海 200093
苏明旭:上海理工大学能源与动力工程学院, 上海 200093

联系人作者:杨荟楠(yanghuinan@usst.edu.cn)

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引用该论文

Yang Huinan,Deng Hao,Jiang Yong,Zhang Yuexing,Su Mingxu. Simultaneous Measurement System of Thickness and Temperature of Two-Wavelength Dynamic Liquid Film[J]. Chinese Journal of Lasers, 2019, 46(4): 0404011

杨荟楠,邓豪,蒋永,张月星,苏明旭. 双波长动态液膜厚度与温度同步测量系统[J]. 中国激光, 2019, 46(4): 0404011

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