| 张洁,刘春泽,王欢,许小芳,周红生.基于超声驻波场的水下颗粒操控研究[J].声学技术,2022,41(2):220~227 |
| 基于超声驻波场的水下颗粒操控研究 |
| Study of underwater particles control based on ultrasonic standing wave field |
| 投稿时间：2021-01-06 修订日期：2021-02-25 |
| DOI：10.16300/j.cnki.1000-3630.2022.02.011 |
| 中文关键词: 超声操控 声辐射力 声学流 驻波声场 |
| 英文关键词: ultrasonic control acoustic radiation force acoustic flow standing wave acoustic field |
| 基金项目:国家自然基金（11774382，11604365）、中科院声学所英才计划（QNYC201828，QNYC201707）资助项目。 |
|
| 摘要点击次数: 478 |
| 全文下载次数: 211 |
| 中文摘要: |
| 超声波产生的声辐射力可以实现对微小物体的操控。针对微米尺度颗粒在液体环境的操控问题，基于黏性介质中的声辐射力理论，建立由双凹球面聚焦超声换能器驱动下的水下颗粒操控模型。利用COMSOL软件仿真了模型的声场、声流场及颗粒操控动态过程，最后通过水下颗粒操控实验对仿真结果进行验证。研究发现，颗粒在水下操控过程受到声辐射力与声流曳力的共同作用，由声波干涉作用形成的局部驻波场主要依靠声辐射力将颗粒团聚在波节位置，但随着颗粒尺寸的减小，颗粒无法继续束缚，颗粒操控将由依靠声辐射力转变为声流曳力。此外声场强度的增加会增强颗粒操控的抗扰动能力。 |
| 英文摘要: |
| The acoustic radiation force generated by ultrasonic wave can control small objects. In view of the problem of micro particle manipulation in liquid environment, based on the theory of acoustic radiation force in viscous medium, an underwater particles control model driven by a biconcave spherical focusing ultrasonic transducer is established. The acoustic field, acoustic flow field and the dynamic process of particles control of the model are simulated by COMSOL software. Finally, the simulation results are verified by underwater particles manipulation experiments. It is found that the particles are affected by the combined action of acoustic radiation force and acoustic drag force during the underwater control process. The local standing wave field formed by acoustic interference mainly relies on the acoustic radiation force to agglomerate the particles at the nodal position, however, with the decrease of particle size, particles cannot continue to be bounded, and the particle control will change from relying on acoustic radiation force to acoustic drag force. In addition, the increase of acoustic field intensity will enhance the anti-disturbance ability of particles control. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
