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通过自行研制的光偏转测试系统对黏性液体中激光空泡脉动特性进行了实验,获得了激光等离子体空泡前两次脉动全过程,从而判定了空泡在脉动过程中对应的最大和最小泡半径;并将不同黏性系数下空泡脉动结果与基于空泡溃灭理论的计算结果进行了对比.结果表明液体黏性对空泡生存周期、空泡半径,以及泡壁的运动速度等均有影响.受液体黏性影响,空泡膨胀或收缩过程明显变缓,其相应的生存周期也越长.这一研究结果不仅可促进空化研究的深入,也可为合理利用空化现象提供参考.
The pulsation characteristics of laser cavitation in viscous liquid were experimentally tested by a light deflection test system developed by ourselves. The whole process of the first two pulsations of laser plasma was obtained, and the corresponding maximum and minimum of cavitation in the pulsation process were determined. The bubble radius and the radius of the bubble were calculated.The results of the bubble pulsation with different viscous coefficients were compared with those calculated based on the bubble collapse theory.The results showed that the liquid viscous effect on the life cycle of the bubble, the radius of the bubble and the velocity of the bubble wall Are affected by the liquid viscosity, the bubble expansion or contraction process slowed down significantly, and its corresponding life cycle longer.The results of this study can not only promote the depth of cavitation research, but also for the rational use of cavitation for reference.