Parametric Classification and Prediction Method of Cavitation Inception under a Tension for a Finite Time and Subsequent Atmospheric Pressure
Parametric Classification and Prediction Method of Cavitation Inception under a Tension for a Finite Time and Subsequent Atmospheric Pressure
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有限时间张力和后续大气压下空化萌生的参数分类和预测方法
DOI：
10.11458/tsj.47.2_116
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
藤川 重雄
中科院分区：
文献类型：
--
作者：
藤川 俊秀;江頭 竜;矢口 久雄;藤川 重雄
基于气泡动力学理论，研究了恒张力下含蒸汽和不凝气体的液体中气泡核的空化初生过程。液体在有限的时间内暴露于张力，之后恢复到大气压力。基于Rayleigh-Plesset方程推导出了适用于处理空化初生的模型方程，并通过与Rayleigh-Plesset方程对液氢、液氧、水、橄榄油和甘油的数值解的比较，验证了模型方程的有效性。得到的简单的公式被发现能够很好地预测的气泡半径的张力施加在气泡上，之后，在随后的大气压下达到的最大半径。气泡的生长行为分为三种情况下取决于三个参数的张力-粘度，初始气体压力-粘度，和表面张力-粘度。
Cavitation inception of a bubble nucleus including both vapor and non-condensable gas in a liquid under a constant tension is theoretically investigated based on bubble dynamics. The liquid is exposed to the tension during a finite time and, after that, restores to the atmospheric pressure. A model equation suitable for dealing with cavitation inception is derived on the basis of Rayleigh-Plesset equation and confirmed to be valid by comparison with numerical solutions of Rayleigh-Plesset equation for liquid hydrogen, liquid oxygen, water, olive oil and glycerol. Simple formulas obtained are found to be able to predict well a bubble radius during the tension being imposed on the bubble and, after that, a maximum radius attained under the subsequent atmospheric pressure. The growth behaviors of bubble are classified into three cases depending upon three parameters on the tension-viscosity, the initial gas pressure-viscosity, and the surface tension-viscosity.