论文部分内容阅读
热声机械作为一种能量转化装置。其效率于传统发动机还有较大差距。本文讨论了热声发动机在驻波和行波两种不同工作状态下，其声功率产生的临界温度梯度与流道尺寸和工作介质的关系，得出了两种模式下最佳的工作条件。结果表明；采用行波形式的热声发动机结构，可以有效降低临界温度梯度，提高热致声的效率，同时可以利用一些低品位来做为热声发动机的高温端。
Thermoacoustic machinery as an energy conversion device. The efficiency of the traditional engine there is a big gap. In this paper, we discuss the relationship between the critical temperature gradient and the flow channel size and working medium of thermoacoustic engine under two different working states of standing wave and traveling wave, and get the best working conditions in two modes. The results show that the use of traveling-wave thermoacoustic engine can effectively reduce the critical temperature gradient and improve the efficiency of thermo-acoustic sounding. At the same time, some low-grade engines can be used as the hot end of thermoacoustic engine.