通过数值模拟方法讨论声悬浮装置中颗粒稳定性

DISCUSSION OF THE STABILITY OF THE PATICLE IN ACOUSTIC LEVITATION APPARATUS BY NUMERICAL SIMULATION METHODS

通过数值模拟的方法讨论了声悬浮装置中几种对颗粒稳定性有影响的因素。结果表明，声源声压级增强会引起声压波形的畸变，增加谐波成分；改变腔室长度，也会影响到谐波的分布。和这些特性相联系的是，在一个周期内，声压节点位置随声源声压级增加而出现不稳定；在声源产压级较低时，声辐射压分布几乎处处为零，随着声压级增加，节点处声辐射压幅值增加，颗粒稳定性增强。

The stability of the particle in Acoustic levitation apparatus is discussed according to the results of the numerical simulation. It has found that with the increase of the Sound Pressure Level (SPL) of sound source, the deformation of the wave form of sound pressure is enhanced and the influence of higher harmonics is strengthened. The distributions of harmonics are also affected by the change of the chamber length. With the increase of the SPL, the nodes of sound pressure move Periodically, and sound radi...