双驱动热声热机谐振管中声波的传播特性研究  

Study on the propagation characteristics of acoustic field in the resonance of the Bi-drivers thermoacoustic engine

作　　者：刘益才[1] 郭方中[2] 

机构地区：[1]中南大学制冷与低温研究所,湖南长沙410083 [2]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2006年第1期24-26,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：中南大学博士后科学基金资助项目;高等学校博士学科点专项基金资助项目(20030487046)

摘　　要：分析了双驱动热声热机谐振管中声波的传播特性,通过分析指出,对于双驱动的热声热机,可以通过改变其反射系数和驱动声源的驱动相位差,进而实现谐振管声场的声压幅值和声场相位的改变.理论研究表明,在|rp|=0.3,相位差为σπ=0.5π时的声压幅值大于σπ=π的声压幅值;而在σπ=0.5π时,声场幅值随反射系数|rp|的增大而增大.实验研究表明,在相位差σπ为常数时,通过改变不同的反射系数值,就可以实现谐振管中声场的调节;在反射系数|rp|为常数时,通过改变谐振管两边驱动声源的驱动电压值,也可以实现声场幅值和相位差的调节.这样就有利于调节结构已经确定的微型热声热机的最佳声场分布,使其达到最优热声转换效率,实现微型双驱动热声制冷机热声制冷效率的最优化.The propagation characteristics of acoustic filed in the resonance tube of the Bi-driver thermoacoustic engine （BDTE） were systematically analyzed. The value and phase of acoustic filed of TE were changed by adjusting the reflection coefficient （｜rp｜） of the sound source and its phase shift （σπ）. The theoretical research showed that on the condition ｜rp｜=0.3, the value of the sound pressure at was bigger than it used to be at. When σπ=0.5π, the acoustic field＇s value grew with the increase of ｜rp｜. On condition, acoustic field in the resonance tube could be adjusted by changing different reflection coefficient. When ｜rp｜ = constant, the adjustment of the value of acoustic field and phase shift were realized by changing the pressure of driver sound source in the two sides of resonance tube. The maximal acoustic efficiency can be achieved toward structure qualification＇s BDTE by adjusting the reflection coefficient （｜rp｜） and phase shift （σπ）.

关 键 词：谐振管 热声热机 声场 传播特性 双驱动 

分 类 号：TB651[一般工业技术—制冷工程] O642[理学—物理化学]