填料物性对热声器件谐振频率的影响

Influence of physical properties of filler on resonant frequency of thermoacoustic apparatus

利用热声网络理论,对热声器件谐振频率进行了分析计算,揭示了热声器件的谐振频率与其填料物性的关系,利用数值计算分析了填料物性对热声器件谐振频率的影响。结论表明在声压一定的情况下,热声器件谐振频率分别随着其填料物性:横截面积、比定压热容以及密度的增大而增大;随着声压的增大,谐振频率分别随填料的横截面积、比定压热容以及密度的增大而增大得更快。

The relations between the resonant frequency of thermoacoustic apparatus and the physical properties of filler in the thermoacoustic apparatus were discovered using the network analogy. The influence of the filler＇s physical parameters on resonant frequency of thermoacoustic apparatus was analyzed through numerical calculations. It is found that at a certain pressure the resonant frequency of thermoacoustic apparatus increase with filler＇ s physical parameters as cross-sectional area,isobaric heat capacity and density, and this phenomenon is more obviously when the pressure increases.