次Bjerknes力作用下气泡的体积振动和散射声场

发布时间：2018-03-01 04:31

  本文关键词： 次Bjerknes力 体积振动振幅 振动初相位 散射　出处：《物理学报》2016年01期 　论文类型：期刊论文

【摘要】：利用Lagrange方程得到了次Bjerknes力作用下气泡的体积振动方程,并探讨了次Bjerknes力作用下不同参数对气泡体积振动振幅和振动初相位的影响,研究了振动初相位差为π和0的气泡对在液体中形成的散射声场特征.结果表明:次Bjerknes作用力下,相邻气泡半径、气泡间距、多方指数均能影响气泡的体积振动振幅,气泡对的均衡半径、气泡间距和驱动频率则对气泡振动初相位产生明显影响;相距很近、相位相差为π的两个气泡的散射声压与气泡体积振动振幅、气泡间距、驱动频率和振动初相位有关,随声场距离成反比减小,与声场位置有关,其平均散射声功率是单个孤立气泡的1/6(kd_(12))~2半径相同、相距很近、相位相同的两个6气泡的散射声压与气泡振动初相位、体积振动振幅、气泡间距、驱动频率有关,随声场距离成反比减小,其平均散射声功率是单个孤立气泡的4倍.
[Abstract]:Using Lagrange equation Bjerknes equation of bubble volume vibration force, and discusses the Bjerknes force under the action of different parameters on the vibration amplitude and vibration effects of the bubble volume of the initial phase of the vibration, the initial phase difference of PI and 0 bubbles on the scattering field characteristics formed in the liquid. The results show that: Bjerknes force, adjacent bubble radius, bubble spacing, multi index can affect the vibration amplitude of the bubble volume, the equilibrium of bubble radius, bubble spacing and driving frequency of bubble oscillation phase influence; the distance is very near, the phase difference between two PI bubble scattering pressure and vibration amplitude of the bubble volume, spacing, driving frequency and vibration phase, inverse distance decreases with the sound field and sound field, the position, the average scattering of sound power is a single isolated bubble 1/6 (kd_ (12)) ~2 radius At the same distance, the scattering sound pressure of the two 6 bubbles with the same phase is related to the initial phase of bubble vibration, volume vibration amplitude, bubble spacing and driving frequency, and decreases with the sound field distance. The average scattering sound power is 4 times that of a single isolated bubble.

【作者单位】： 陕西师范大学陕西省超声学重点实验室;宁夏师范学院物理与信息技术学院;
【基金】：国家自然科学基金(批准号:11174192,11374200,11474192)资助的课题~~
【分类号】：O32
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本文编号：1550404