关于温度梯度与Higgins-Rijke型热声现象的研究  

Study on temperature gradient and Higgins-Rijke type heat-driven sound

作　　者：陈福连[1] 涂建华[1] 王勤勇[1] 

机构地区：[1]浙江工业大学,杭州310014

出　　处：《声学学报》2002年第5期420-424,共5页Acta Acustica

基　　金：国家自然科学基金资助项目

摘　　要：从声通量的观念阐明Higgins-Rijke管的热声现象机理。由于热源处的温度梯度、管内驻波场的质点振速和脉动压力之间的相位差偏离90°,因此有声通量。流出和流入热源区的声通量之差为正值时,该热源区是声源;若声通量之差为负值,则是声壑。用本模型不仅合理地解释了热源位置在管中的重要性,也较好地解释了 Higgins-Rijke管中的其他各种现象。A new mechanism of Higgins-Rijke heat-driven sound is expounded based upon sound energy flux in present paper. Due to temperature gradient of heat source, the phase angle between pressure and particle velocity in standing wave field within Higgins-Rijke tube deviates from 90° and therefore there is sound energy flux in the tube. If the difference of sound intensity between outing from and entering into heat source is positive, this heat source is a sound source; and contrarily the heat source is a sound absorber. The present mechanism can explain not only the importance of heat source location but also almost all phenomena in Higgins-Rijke tubes.

关 键 词：温度梯度 热声现象 质点振速 脉动压力 热声转换 Higgins-Rijke管 振范燃烧 

分 类 号：O482.2[理学—固体物理]