摘要
基于镜像原理,研究了声化学反应器内远场的声指向性.结果表明:声源频率愈高,主声束愈窄,同时旁瓣则受抑制;相邻换能器间距愈大,主声束愈窄,旁瓣峰值愈高.虚源级数与主声束无关,但虚源级数愈高,指向性愈尖锐,且旁瓣受抑制.这表明声化学反应器纵向与横向尺寸的比值越大,虚源级数越高,更能准确描述远场的指向性.
Based on the principle of mirror image, the directivity in far field of sonochemical reactors is studied. The theoretical analysis and simulation shows that the higher transducer frequency, the narrower main acoustic beam and the smaller side lobe. The longer distance between adjacent transducer, the narrower main acoustic beam and the higher side-lobe peak. Besides,there is no relevance between the virtual source series and main acoustic beam. But the higher the virtual source series, the sharper directivity and the smaller side lobe. This suggests
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第4期39-42,共4页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(10574085)
陕西省教育厅科研计划基金项目(05JK165)
关键词
组合声源
镜像原理
主声束
指向性
仿真
transducer array
mirror principle
main acoustic beam
directivity
simulation
