球形粒子在低频声场作用下悬浮的实验研究  

Experimental investigation of spherical particle levitation in low frequency acoustic fields

作　　者：李冰航[1] 吴嘉[1] 席葆树[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《清华大学学报（自然科学版）》2002年第S1期8-10,22,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金项目 (1973 2 0 3 0 )

摘　　要：研究低频下的声悬浮现象对材料无容器处理、颗粒输运等有重要意义。本文用实验手段研究了声场频率、声强以及颗粒粒径等参数对颗粒声悬浮现象的影响。结果表明 ,低频下粒子在适当的声场强度范围内才能够悬浮 ,通过改变声场频率可以控制悬浮位置 ,粒子粒径影响悬浮的稳定性。Acoustic levitation at low frequency can be used for containerless material processing and particle transport. Experiments were imducted to analyze the effects of parameters such as the frequency and intensity of the acoustic field and the diameter of the levitated particles on the acoustic levitation. The results show that only contain low frequency intensities can levitate the particles. The acoustic field frequency affects the particle levitation position while the particle diameter affects the levita...

关 键 词：声悬浮 悬浮位置 粒子 

分 类 号：O429[理学—声学]