文章摘要
徐峥,陈皓,程茜,周红生,钱梦騄.点聚焦超声辐照下液体中的声场和声化学场分布[J].声学技术,2014,33(3):218~221
点聚焦超声辐照下液体中的声场和声化学场分布
Imaging and numerical simulation of sound field in liquid induced by point-focusing ultrasound transducer
投稿时间:2013-11-28  修订日期:2014-03-08
DOI:10.3969/j.issn1000-3630.2014.03.007
中文关键词: 点聚焦  声场成像  声化学场  间接辐照
英文关键词: point-focusing  sound field imaging  sonochemical reaction field  indirect irradiation
基金项目:国家自然科学基金(11274342,10804085,11174223)、同济大学重点建设项目(139143)、中央高校基本科研业务费专项资金(1370219175)、上海市自然基金(11ZR1446100)资助项目
作者单位E-mail
徐峥 同济大学物理科学与工程学院, 上海 200092  
陈皓 同济大学物理科学与工程学院, 上海 200092  
程茜 同济大学物理科学与工程学院, 上海 200092  
周红生 中国科学院声学研究所东海研究站, 上海 200032  
钱梦騄 同济大学物理科学与工程学院, 上海 200092 mlqian@tongji.edu.cn 
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中文摘要:
      通过数值模拟和实验分别研究了点聚焦超声换能器在液体中直接辐照和间接辐照时产生的声场和声化学场分布。研究结果表明,在直接辐照时,数值模拟得到的液体中声压较大位置与声化学反应场位置相一致:在聚焦超声焦点处及液体表面附近。当使用间接辐照时,焦点处声压减小,在试管底与超声换能器之间形成驻波。为了增加间接辐照时容器内的声压,实验使用底端贴有薄膜的双通试管,通过计算机模拟和实验证明在该情况下,容器内声压,特别是容器焦点处声压和声化学反应场有所增强。
英文摘要:
      In this work, numerical simulation and experimental studies are carried out to investigate the distribution of ultrasonic and sonochemical fields in a liquid induced by the direct or indirect irradiation of a point-focusing ultrasound transducer. Results indicate that the sonochemical reaction fields are consistent with the high amplitude acoustical fields by direct irradiation. High amplitude acoustical fields are observed at the focused point and near the liquid surface. The amplitude of acoustical field is decreased at the focused point when indirect irradiation is used. Standing waves are formed between the bottom glass of tube and the transducer. To enhance the pressure amplitude at the focused point, a film is pasted on the bottom of a double-passing tube. In this case, simulation and experiment results indicate that the acoustical pressure in the tube is increased.
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