摘要
根据炉内单排换热器管阵列声传播特性的研究,利用Twersky声散射理论和光学法布里-珀罗干涉原理,研究双排换热器管阵列的声传播特性,分析了双排管阵列对声波的反射、透射和衍射机制,给出了计算炉内双排管阵列声透射与反射系数的数学模型,计算了炉内双排管阵列的声反射与透射系数随声波频率、管阵列横向与纵向节距等参数变化的关系曲线,以及传输泄漏声辐射信号时的聋带和聪带的分布特征,指出双排管阵列对声波的截止带和导通带的位置与管阵列结构参数和炉内温度有关,并在炉内实际环境参数下对声传播特性进行了数值计算,为研究多排管阵列的声传播特性提供了方法,也为利用管阵列透射声谱判断管道泄漏口发生在管排阵列中的位置提供了依据。
Based on the propagation through one tube study of the sound wave row, by using the Twersky＇s sound scattering theory and the Fabry-Perot＇s interference theory, the sound transmission behaviors of two tube rows are studied. The physical mechanisms of the reflection, transmission and diffraction characters about two tube rows are analyzed. A mathematic model is established for calculating the sound wave scattered by two tube rows. The transmission and reflection coefficients of two tube rows varying with the tube-row structure and the sound frequency are calculated. It is revealed that there is some stop-band and pass-band effects with the two tube rows when sound wave propagating through it. The stop and pass band distribution is related to the two tube rows structure parameter and temperature in boiler. This paper is helpful to study on the sound wave propagation through two-dimension tube array and detect where the leak position is for the leak detection in the tube array.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第17期106-111,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(10574043)
教育部科学技术研究重点项目(106051)~~
关键词
泄漏检测
双排管阵列
声传播
透射系数
反射系数
leak detection
two tube rows
sound wave propagation
transmission coefficients
reflection coefficients
