摘要
提出一种数值计算模型以描述声子晶体和包膜气泡群构成的声二极管中声传播。声子晶体中的声传播基于有限差分的方法数值求解,而微气泡中的非线性声传播采用非线性声波方程耦合微气泡振动方程求解。数值模拟的结果与已报道的实验结果相符合,证明了数值模型的有效性。在此基础上进一步讨论了包膜气泡参数改变对声二极管整流比的影响。
A numerical model is proposed for describing sound propagation in an acoustic diode which is formed by phononic crystals and coated microbubble suspension. The sound propagation in phononic crystals is simulated by us-ing finite-difference method; the non-linear sound propagation in the suspension containing coated microbubble is solved by using the nonlinear acoustic equation coupled with microbubble dynamic equation. The results of numerical simulation match well with the experimental ones, which verify the validity of the numerical model. Furthermore, the effect of coated microbubble’s parameters on acoustic diode’s rectification ratio is discussed.
出处
《声学技术》
CSCD
2013年第5期353-356,共4页
Technical Acoustics
基金
国家科技部973计划(2011CB707900)
国家自然科学基金(81127901
10974093
11174141
11104140)
江苏省自然科学基金(BE2010768)
江苏高校优势学科建设工程资助项目
关键词
声二极管
微气泡
非线性传播
整流比
acoustic diode
microbubble
nonlinear propagation
rectification ratio
