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摘要: :高功率激光聚焦击穿液体介质,类似于聚焦区域发生了微爆炸。研究了激光聚焦击穿爆炸与水下 微爆炸之间的相似性。采用高功率脉冲激光器、光学聚焦系统、高速摄像、测量水听器建立了激光击穿爆炸源 的产生及爆炸气泡、爆炸声波特性测量系统。对不同参数激光聚焦击穿水、酒精、硅油等粘性液体,观测到了 激光击穿爆炸冲击波、气泡脉动、气泡压缩冲击波辐射。通过对爆炸气泡高速图像序列的分析,得到了不同液 体介质中爆炸气泡的脉动特征、冲击波强度、爆炸声波等特性规律。实验结果可为舰船生命力、舰船结构防护 等水下爆炸气泡的研究提供参考。Abstract: Thesimilitudewasanalyzedbetweenthecharacteristicsofexplosionbubblesgeneratedby laser-inducedbreakdownanddetonatorexplosioninwater.Bycombiningahighpowerlaser,anopticalfocussystem, ahigh-speedcameraandahydrophone,ameasurementsystemwasdevelopedtoexperimentallyinvestigatethelaser- inducedbreakdowninliquidssuchaswater,alcohol,siliconinthe casesofthedifferentlaserenergy.Basedonthedevelopedmeasurementsystem,aseriesoflaser-inducedbubblecharacteristicswereobtained, whichincludedtheimagelistsofexplosionbubbledynamics, expansionandcollapse,andtheparametersofexplosionbubblediameterevolvements,bubbleexpansionandcollapseshockwavevelocitiesandacousticsignalintensities.
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Key words:
- mechanicsofexplosion /
- explosionbubble /
- laser-inducedbreakdown /
- laser-induced
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