行波热声发动机容腔管和反馈管的调相作用研究

带环形圈的热声发动机是一种新型的行波型热声发动机,由于能够在环形圈内回热器附近调制出行波相位,因此具有比驻波发动机更高的效率。环形圈的反馈管和180度弯管分别在系统中起着感和容的作用,在相位的调制过程中它们起着至关重要的作用,尤其是对于感的作用比较强的小型系统,它们的作用更加突出。该文通过计算,分析了小型行波热声系统中感和容对于回热器入口处和回热器中心位置处的压力波动和体积流率相位的调制作用,以及这种调制作用对于效率,压力波动的幅值的影响。

Investigation on phase shifting of inertance and compliance in the traveling wave thermo-acoustic engine

Thermo-acoustic engine with looped tube is a new traveling wave thermo-acoustic engine,which provides higher efficiency than standing wave thermo-acoustic due to traveling wave phase near the regenerator in the looped tube.In the looped tube,the feedback tube and compliance tube have been regarded as inertance and compliance respectively,which are critical in the phase shifting,especially for miniature system which has more inertance effect.In this paper,the phase lead Φ of U relative to P of the beginning and intermediate of the regenerator due to various inertance and compliance has been calculated and analyzed.The engine's performance due to various inertance and compliance also has been described.It concluded that the smaller inner radius of the compliance tube and bigger inner radius of the feedback tube can shift the phase lead of U relative to P effectively,which can bring better performance.