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谐振管作为热声发动机的重要组成部分,其长度占整个系统轴向长度的大部分。本文提出了一种利用液体和弹性膜组成谐振系统的方法,并使用这种谐振系统取代谐振管,使系统轴向尺寸减少为原来的1/5。文中利用线性热声理论对该谐振系统的谐振频率进行了计算,并对不同阻尼系数对系统的耗散做出了分析。实验结果表明,在利用驻波热声发动机驱动的情况下,谐振系统自激起振,谐振频率为360 Hz,实际谐振频率与计算值误差在5%以内。
Resonant tube as a thermoacoustic engine an important part of its length accounted for most of the axial length of the entire system. In this paper, a method of forming a resonant system using liquid and elastic membrane is proposed and the resonance system is replaced by a resonant system to reduce the axial dimension of the system to 1/5 of the original one. In this paper, the resonant frequency of the resonant system is calculated by linear thermoacoustic theory, and the dissipation of the system with different damping coefficients is analyzed. The experimental results show that the resonant frequency of the resonant system is 360 Hz and the actual resonant frequency is within 5% of the calculated value.