Abstract: In this paper the modern electron-optical equipment is used to translate the clear image of fast-moving bubbles in the bubbling liquid on a sieve tray into the digital information stored in the computer, and the computer-aided image-analysis technique is utilized to measure the bubble size distributions and interfacial areas under various operating conditions.The dynamic behavior of bubbles in the turbulent liquid is analyzed theoretically, the mechanism of bubble deformation and breakage is explored on the basis of Kolmogoroff’s isotropic turbulence hypothesis, and the mathematical model for predicting gas-liquid interfacial area is proposed.The comparison between the simulated results and the experimental data shows that the model is accurate,simple and convenient for use.

Key words:

气泡直径分布, 相界面积, 多相湍流动力学, 计算机图像处理, 精馏塔板

摘要： 利用现代的电子光学测试仪器和计算机图像处理技术较准确地测量了精馏塔板上鼓泡液体中气泡的粒径分布和相界面积.同时，还从理论上分析了湍流液体中气泡变形与破碎的机理，提出了预测气液相界面积的多相湍流动力学模型.模拟计算结果与实验测量数据的比较证明，此模型有较高的准确性，而且形式简单，应用方便.

关键词:

气泡直径分布, 相界面积, 多相湍流动力学, 计算机图像处理, 精馏塔板