全息激光干涉技术测定气体的液相扩散系数  

Determination of Liquid Diffusion Coefficient of Gas by Holographic Interferometer

作　　者：伞洪亮[1] 何明霞[1] 吴玉风[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072

出　　处：《化学工业与工程》2006年第6期562-565,共4页Chemical Industry and Engineering

摘　　要：介绍了一种测定液相扩散系数的实时激光全息干涉系统。通过该系统得到清晰表征浓度场分布的实时全息干涉条纹图,利用全息干涉原理及相应的数学关系处理干涉条纹,得到液相扩散系数。利用该方法测定了CO2在乙醇、正丙醇中的扩散系数,结果与文献值非常接近。该方法具有实时、快速、简单和准确等优点,它是一种发展前景很好的液相扩散系数测定方法。A real-time holographic interferometer specially designed for measuring liquid diffusion coefficients was described. Using the interferometer, the distinct real-time interference fringes indicating the concentration profiles of the liquid were obtained, the liquid diffusion coefficient was directly measured from the interferograms by finite fringe system intentionally introduced to the interferometer. The diffusion coefficients of carbon dioxide in ethanol and n-propanol were measured by this method, and the results are closed to theoretical values. This method with real-time, accuracy, simpleness and promptness will have good prospect in measuring liquid diffusion coefficient.

关 键 词：全息干涉 实时 扩散系数 气液界面 

分 类 号：O657.38[理学—分析化学]