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为了掌握乳化油液滴在水击谐波流场中的碰撞、破裂、聚集和变形等微观形态的变化规律,采用粒子图像测速(PIV)技术对水平方管中乳化油液滴的水击谐波流场进行了测量,分析了在水击谐波流场中,不同激振力作用下乳化油液滴的粒径变化。测量结果表明,在水击谐波流场作用下,乳化油液滴平均粒径的增长率随着激振力的减小而减小,随着作用时间的增大呈增加趋势,直至粒径处于一种动态平衡;乳化液滴随着激振力增大到达波节聚集位置的时间减少,可见增大水击谐波激振力有利于乳化液滴的聚集并合并为大尺度的液滴,从而有效地提高了水击谐波流场作用下的油水分离效果。
In order to grasp the changing rules of the micro-morphology of the emulsified oil droplets in the water hammer harmonic flow field such as collision, rupture, aggregation and deformation, the water hammer of the emulsified oil droplets in the horizontal square tube by the particle image velocimetry (PIV) The wave field was measured and the droplet size of emulsified oil was analyzed under the different excitation force in the water hammer harmonic flow field. The results show that under the action of water hammer harmonic flow field, the growth rate of the average droplet size of the emulsified oil decreases with the decrease of the exciting force and increases with the increase of the action time until the particle size In a dynamic equilibrium; emulsion droplets with the excitation force increases to reach the site of convergence of nodes to reduce the time, we can see that increasing the water hammer harmonic excitation force is conducive to the aggregation of emulsion droplets and merge into large-scale droplets , Thus effectively improving the oil-water separation effect under the water hammer harmonic flow field.