锅炉管阵列中的声二极管效应与冷态缺陷研究  

Study on Acoustic Diode Effect and Cold Point Defect in Boiler Tube Arrays

作　　者：刘月超 姜根山[2] 许伟龙[1] 孔倩[2] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]华北电力大学数理学院,河北保定071003

出　　处：《动力工程学报》2018年第1期1-7,12,共8页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(11674093;11474091;11274111);河北省自然科学基金资助项目(A2015502077);中央高校基本科研业务费专项资金资助项目(2017XS138)

摘　　要：基于声子晶体理论,通过设定管阵列的几何参数和温度等环境参数,采用数值计算方法分析了声波通过2种不同结构管阵列的传播特性,得到在某些频率范围内存在声波的单向导通特性,并对冷点缺陷位于管阵列中不同位置处的声传播特性进行了计算.结果表明:声波的单向导通特性与2种管阵列过度位置的结构排布方式有关;管阵列中存在冷点缺陷时其声传播特性会发生变化;研究声波通过不同管阵列的声传播特性对管阵列中声源定位有重要意义.Based on phononic crystal theory, numerical method was used to analyze the sound transmission characteristics through two different tube arrays by setting the tube array parameters and surrounding tem- peratures, and to study the sound transmission characteristics when the cold point defect lies in different areas of tube arrays. Results show that the sound transmission characteristics present unidirectional behav- ior within a certain range of frequencies, which is related to the transition structure between two different tube arrays. Cold point defects affect the sound transmission characteristics. The study results on sound transmission characteristics may serve as a reference for acoustic location in different tube arrays.

关 键 词：管阵列 声子晶体 声传播特性 声二极管 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]