中文摘要：

以t／4波长驻波热声热机为研究对象，建立了平行板叠结构回热器以及异形板叠结构回热器的数值模型，采用Fluent软件分析了这两种结构回热器产生的压力、速度以及流场．研究结果表明：异形板叠结构回热器自激振荡达到饱和所需的时间比较短，压力幅值比较高；非线性声场的扰动，导致不同时刻回热器冷热两端温度分布不稳定，相比平行板叠结构回热器，异形板叠结构回热器温度梯度比较小，有利于低品质热源的应用；针对板叠结构回热器，改变平板的结构，有利于实现热声系统的匹配；异形板叠结构回热器周围的流场明显强于平行板叠结构回热器，有利于流固之间的耦合，提高了热声转换的效率．

英文摘要：

A 1/4 wavelengh thermoacoustic standing wave engine was studied. The numerical model of paraller-plate regenerator and sketch-plate regenerator was built after the pressure, velocity and flow field of these two kinds of regenerator investigated by Fluent software. The results show that the time achieving the saturation is shorter for self-excited oscillation of sketch-plate regenerator, the pressure ampitude is higher. For the disturbance of nonliner acoustic field, the temperature-distribu- tion of cold and hot ends for regenerator is unstability. Compared with the paraller-plate regenerator, the temperature gradient of sketch-plate regenerator is smaller, which is conducive to the application of low quality heat source. According to the plate regenerator, changing the structure of flat can a- chieve the matching of thermoacoustic system. Compared with the flow field of paraller-plate regener- ator, the sketch-plate regenerator is stronger, which is conducive to coupling between fluid and solid, improving the efficiency of thermoacoustic conversion.