本文针对一台气液耦合振动热声发动机,以1.5kg的水作为液柱,以氮气、氦气、氩气和二氧化碳分别作为气体工质,在2.0 MPa平均工作压力下,实验对比了不同气体工质对谐振频率、压力振幅和板叠热端温度等系统性能参数的影响。实验结果表明,在相同加热功率下,采用氩气的系统获得的压力振幅最大;而在相同板叠热端温度下,以二氧化碳为气体工质能够获得最大的压力振幅。 In this paper, a gas-liquid coupled vibro-thermoacoustic engine with 1.5 kg of water as the liquid column, with nitrogen, helium, argon and carbon dioxide as the gas working medium, the average working pressure of 2.0 MPa, the experimental comparison of different gases Effect of working fluid on system performance parameters such as resonant frequency, pressure amplitude and plate stack hot end temperature. The experimental results show that the pressure amplitude obtained by the system with argon is the highest under the same heating power, and the maximum pressure amplitude can be obtained by using carbon dioxide as the gas working medium at the same plate stack temperature.