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首页> 外文期刊>Journal of nuclear science and technology >Mitigation Technologies for Damage Induced by Pressure Waves in High-Power Mercury Spallation Neutron Sources (III) — Consideration of the Effect of Microbubbles on Pressure Wave Propagation through a Water Test —
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Mitigation Technologies for Damage Induced by Pressure Waves in High-Power Mercury Spallation Neutron Sources (III) — Consideration of the Effect of Microbubbles on Pressure Wave Propagation through a Water Test —

机译：大功率汞散裂中子源中压力波造成的损害的缓解技术（III）—通过水试验考虑微气泡对压力波传播的影响—

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The effects of microbubbles dispersed in a liquid on a high-rising-rate pressure wave were experimentally investigated with water. Intense, high-rising-rate pressure waves with a rise time of about 1.5μs were produced by a spark discharge in water, and gas microbubbles were produced by two different bubble generators. Particular attention was focused on the attenuation effect of microbubbles on propagating pressure waves. The dependence of the attenuation effect on the radius and void fraction of the micro-bubbles was carefully examined. It was found that when the microbubbles are sufficiently small (e.g., about 50 μm in peak radius), the amplitude of wall vibration induced by the spark-induced pressure wave is dramatically decreased with an increase in void fraction. The present study provides strong experimental evidence that microbubbles can act as a strong absorber for high-rising-rate pressure waves as recently predicted numerically.
机译：用水实验研究了分散在液体中的微气泡对高上升率压力波的影响。水中的火花放电产生了大约1.5μs的上升时间的高强度高压力波，而两个不同的气泡发生器则产生了气体微气泡。特别关注的是微气泡对传播的压力波的衰减作用。仔细检查了衰减效应对微气泡半径和空隙率的依赖性。已经发现，当微气泡足够小（例如，峰值半径为约50μm）时，由火花引起的压力波引起的壁振动的幅度随着空隙率的增加而显着减小。本研究提供了有力的实验证据，表明微气泡可以作为高上升率压力波的强吸收剂，正如最近数值预测的那样。

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