基于声流耦合场的超声驻波悬浮器声场分析

Acoustic Field Analysis of Ultrasonic Standing Wave Levator Based on Acoustic Flow Coupling Field

摘要: 本文基于声流耦合场对超声驻波悬浮器的声场进行了仿真分析，探讨了驻波声场在液体介质中形成的特性以及其对悬浮颗粒的影响。超声驻波悬浮技术通过压电陶瓷换能器产生的高频声波，在液体中形成声辐射力与重力相平衡的悬浮现象。通过三维有限元仿真模型，研究了流体入口设置、流场速度分布和声压的耦合作用，分析了驻波节点与流体速度低速区域对颗粒悬浮稳定性的影响。仿真结果表明，声场在流体介质中形成了稳定的驻波结构，驻波节点区域与低流速区域的重合，为颗粒的稳定悬浮提供了理想条件。本文的研究验证了液体介质下超声悬浮器的可行性，为细胞悬浮培养、微粒分离等应用领域提供了重要的理论支持和技术参考。

Abstract: In this paper, the sound field of ultrasonic standing wave levator is simulated based on the coupling field of sound flow, and the characteristics of the standing wave sound field in liquid medium and its influence on suspended particles are discussed. The ultrasonic standing wave suspension technique is a kind of suspension phenomenon in which the sound radiation force and gravity are balanced by the high-frequency sound wave generated by the piezoelectric ceramic transducer. The coupling effects of fluid inlet setting, velocity distribution of flow field and sound pressure were studied by three-dimensional finite element simulation model. The effects of standing wave node and low velocity region on particle suspension stability were analyzed. The simulation results show that the sound field forms a stable standing wave structure in the fluid medium, and the coincidence of the standing wave node region and the low-velocity region provides an ideal condition for the stable suspension of particles. This study verifies the feasibility of ultrasonic levator in liquid medium, and provides important theoretical support and technical reference for cell suspension culture, particle separation and other applications.