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分析了空泡溃灭辐射光子的基础理论,建立了自由场液体中激光空泡的产生、脉动及溃灭冲击波、溃灭发光的高速摄影测量实验平台。采用高速摄影技术对不同液体、不同空泡尺寸条件下空泡脉动的外形特征、溃灭冲击波、溃灭发光强度等参数进行测量。结果表明,激光空化技术是产生稳态单一空泡的较好手段;对于不同的液体介质中的激光空泡,激光等离子体空泡膨胀、空泡溃灭辐射冲击波强度主要与液体的粘性系数相关;激光空泡发光与最终溃灭是同相位的;空泡溃灭发光强度与液体的表面张力、饱和蒸气压力有极强的相关性。
The basic theory of photon collapse was analyzed, and a high-speed photogrammetry experiment platform for laser bubble generation, pulsation and collapse in free-field liquid was established. High-speed photographic technique was used to measure the shape characteristics, collapse shock wave and collapse luminescence intensity of the vacuoles in different liquids and different cavities. The results show that the laser cavitation technique is a good method to produce steady-state single cavitation. For the laser cavitation in different liquid mediums, the cavitation of the laser plasma expands and the intensity of the bubble shock radiation is mainly related to the viscous coefficient The correlation between the laser cavitation luminescence and the eventual collapse is in phase. The luminescence intensity of the bubble collapse has a strong correlation with the surface tension of the liquid and the saturated vapor pressure.