摘要
设计并建造了一台声驱动的热声装置 ,用于研究回热器的声学特性。从理论上利用相关谱分析方法 (包括自相关谱与互相关谱 ) ,得到热声系统中回热器的声反射系数 ,复声阻抗 ,传播损失和回热器处的入射波与反射波相位差。并通过实验测得的压力信号分析回热器的声学特性。分析比较换热器及不同加热功率的情况下 ,对回热器声学特性的影响 ,结论有利于进一步辨识回热器模型中的未知参数。
An acoustic-driven thermoacoustic device has been designed and tested, which is used to investigate the acoustic characteristics of regenerator. Using correlation-spectra analysis in theory,the reflection coefficient, the complex acoustic impedance, the transmission loss and the phase difference between the incident wave and the reflected wave of regenerator in the thermoacoustic apparatus are obtained.The acoutic characteristic of regenerator is analyzed using pressure signals.The influence of the acoutic characteristic of regenerator is discussed under conditions of the different heat exchanger and the different heat power.The results obtained will be helpful to the futher investigations on the model of regenerator.
出处
《低温工程》
CAS
CSCD
北大核心
2004年第6期33-37,共5页
Cryogenics
基金
国家自然科学基金 (E0 6 0 10 7- 5 0 2 76 0 6 4 )资助
