| 除垢超声波传播影响因素的理论研究 |
| |
| 引用本文： | 张艾萍,刘超,徐志明.除垢超声波传播影响因素的理论研究[J].工程热物理学报,2012(3):469-472. |
| |
| 作者姓名： | 张艾萍 刘超 徐志明 |
| |
| 作者单位： | 华北电力大学;东北电力大学 |
| |
| 基金项目： | 国家自然科学基金项目(No.51076025);吉林省教育厅“十一五”科学技术研究项目(No.2009104) |
| |
| 摘 要： | 从一维平面波理论入手分析了超声波声压分布特性。依据多普勒频移原理,在声场的运动方程,连续性方程,波动方程的基础上,建立一个超声波在流动的液体中传播的控制方程。根据轴对称模型的实际特点,简化了所得方程,并求出解析解。结果表明流动液体可以产生声波的衰减。液体的黏滞性是产生超声波衰减的重要原因。超声波的频率较高,液体的黏滞性对超声波衰减影响明显。依据黏滞力与速度梯度的关系,建立一个超声波在黏滞液体传播的控制方程,并依据边界条件求出解析解,反映了媒质黏滞性对超声波传播尤其是衰减特性的影响。
|
| 关 键 词： | 超声波 流动液体 黏滞性液体 超声波衰减 |
A Theoretical Research on the Affective Factors of the Transmission of Ultrasonic Used in Descaling |
| |
| ZHANG Ai-Ping,LIU Chao,XU Zhi-Ming.A Theoretical Research on the Affective Factors of the Transmission of Ultrasonic Used in Descaling[J].Journal of Engineering Thermophysics,2012(3):469-472. |
| |
| Authors: | ZHANG Ai-Ping LIU Chao XU Zhi-Ming |
| |
| Institution: | 1.North China Electric Power University Beijing 102206,China;2.Northeast Dianli University,Jilin 132012,China) |
| |
| Abstract: | Start with one-dimensional plane wave problem,it analysed ultrasonic sound pressure distributing characteristic.Judge by Doppler shift principle,it build an equation which depict that ultrasonic disseminate in the mobile liquid.According to the characteristic of axial symmetry model, it facilitates and solve the equation.The results indicate that the velocity of mobile liquid can and enhance the sound wave attenuation.Liquid viscositv play an important role in sound wave attenuation.The high frequency of ultrasonic,the more attenuation will produce.According to the relationship between viscous force and velocity gradient,it build an equation which depict that ultrasonic disseminate in the viscous liquid.The boundary conditions is given,the solution is gotten. It reflects the liquid viscosity’s effects on the diminishing characteristics of the ultrasonic’s transmission. |
| |
| Keywords: | ultrasonic mobile liquid viscous liquid ultrasonic attenuation |
| 本文献已被 CNKI 等数据库收录！ |
|
