谐振管几何形状对热声发动机工作性能的影响

Experimental study on different resonance tubes in thermoacousic engine

谐振管作为热声发动机的重要部件之一,其几何参数的变化对热声系统的工作性能有重大影响,在驻波型热声发动机系统上对锥形谐振管和圆直谐振管进行了初步的实验对比,以探明谐振管的形状对热声发动机系统性能的影响。实验结果表明,在系统的工作频率固定在130Hz的情况下,无论是压比、输出声功,还是相对卡诺效率,采用锥形管的系统都要比采用圆直管的系统具有更大的优势。

The resonance tube is one of important parts in the thermoacoustic engine system.The change of its geometrical parameter has tremendous effect on the performance of thermoacoustic engine system.This paper reports a series of experimental studies of the performance in contrast with cone-shaped resonance tube and cylindrical resonance tube in one same standing-wave thermoacoustic engine. The preliminary results show that when the system frequency is constant 130 Hz, almost all of the system parameters,such as pressure ratio, output power and relativity Carnot efficiency in the system with cone-shaped resonance tube are better than that with cylindrical resonance tube.