利用激光测量气体微小扩散量的研究  

Study on measuring tiny diffusion of gas using laser

作　　者：黎庆[1] 

机构地区：[1]黑龙江省石油化学研究院化工中心,哈尔滨150040

出　　处：《哈尔滨商业大学学报（自然科学版）》2008年第4期496-499,502,共5页Journal of Harbin University of Commerce：Natural Sciences Edition

摘　　要：在油压系统中,存在于工作液体中的气泡、压力的变化特别是突然的变化等有时会导致系统不能继续正常地运转,甚至产生破坏.气体与液体之间的扩散是使得液体中的气泡生长及压力变化的主要物理现象.因此有必要研究气体—液体之间的扩散特性.提出了一种使用激光干涉法和U型管相结合,对气体体积的非常微小的变化进行测量的方法.对于气体—液体,气体—液体—橡胶组成的体系的扩散量分别进行了测量.为了验证此种方法的精确程度,推导出了从理论上计算气体扩散的计算方法.测量结果与计算值都能很好地吻合.实验结果上验证了橡胶层的存在对气体的扩散量将会产生一定的影响.In oil hydraulic systems, bubbles in the working liquid or pressure pulsation or surge sometimes damage the system performance. Diffusion between gas and oil is the primary physical phenomenon which dominates the growth of bubbles in liquid. It is necessary to study the diffusion behavior between gas and liquid. In this paper, a method is proposed to measure the minute change of the gas volume using a installation consists of laser heterodyne interferometry and a pile with U shape. The volume of the gas to liquid or liquid--rubber system is measured. On the other hand, an equation is derived to calculate the diffusion volume of the gas. As a result, the value calculated from the theoretical equation is almost the same to the experimental one. Furthermore, the diffusion volume is affected because the rubber layer is added.

关 键 词：扩散量 激光 干涉法 扩散 

分 类 号：TB133[机械工程—光学工程]