On the Characteristics of Cavitation Formation Subjected to Underwater Blast Shock Wave
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摘要: 对水下爆炸冲击波作用下的局部空化和区域空化形成特性进行了理论和实验研究。引入平面冲击波假设，理论分析了结构几何尺度及冲击波参数的变化对空化区域形成的影响，并在直径5 m的圆柱形水箱中，对边长1 m、厚度2 mm的方形钢板在50 g TNT炸药、1 m爆距条件下进行了水下爆炸冲击实验，以验证局部空化理论。研究结果表明：在相同的冲击条件下，结构尺度的变化对局部空化的形成具有较大影响；炸药质量及爆深的变化会改变区域空化的形状及范围；实验结果与局部空化理论计算结果基本一致。Abstract: On the basis of plane shock wave hypothesis, the characteristics of local cavitation and bulk cavitation formation subjected to underwater explosion were theoretically and experimentally studied. The effects of structure dimensions and shock wave parameters on the cavitation formation were analyzed theoretically. Aiming at validating the local cavitation theory,an underwater explosion experiment in a 5 m diameter columned water tank was carried out. The explosion layout was as follows: 50 g TNT charge was placed at a 1 m stand-off away from a 1 m square and 2 mm thick steel plate.Results show that different structure dimensions can affect significantly the formation of local cavitation under the same shock wave parameters, and the quantity and depth of charges play an important role in the bulk cavitation formation. The experimental results basically agree with those of theoretical analysis.
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Key words:
- cavitation /
- underwater explosion /
- shock wave /
- computation /
- experimental study
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