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1 引言 多组分相际传质的理论研究进展缓慢,由于实验技术的限制,现有的传质理论尚未得到验证,其微观机理尚不清楚,而深入研究多组分相际传质的关键问题是选择合适的浓度测量方法.目前,激光测温已普遍应用于各学科研究领域,但浓度场的测定尚限于浓度变化大且变化区域大的体系,文献报道最多的是扩散系数的测定.苗容生等利用显微激光全息干涉技术,成功地测出了湍流场中二元气液传质液相侧边界层内的浓度场变化.对于三元系统的测量,迄今未见文献报道,本文利用双波长激光显微全息干涉技术,对三元气液传质液相侧边界层内的浓度分布进行测量.
1 Introduction The progress of theoretical research on mass transfer between multiple components has been slow. Due to the limitations of experimental techniques, the existing mass transfer theory has not been validated yet. The microscopic mechanism is not clear yet, and the key to mass transfer of multiple components The problem is to select the appropriate concentration measurement method.At present, the laser temperature measurement has been widely used in various fields of research, but the determination of the concentration field is still limited to the concentration of large changes in the region and the system, the literature reported the most is the determination of the diffusion coefficient. Miao Rongsheng et al. Successfully measured the change of concentration field in the boundary layer of the liquid-liquid two-phase liquid-liquid medium in the turbulent flow field by using the micro-laser holographic interference technique. For the measurement of the ternary system, no literature has been reported so far, The dual-wavelength laser micro-holographic interferometry was used to measure the concentration distribution in the liquid-phase boundary layer of the ternary gas-liquid mass transfer.