论文部分内容阅读
本文根据经典热声学理论,对声学双作用型行波热声发动机系统进行了全面的(火用)损失分析.系统产生的(火用)损失可以分为内部不可逆损失与外部不可逆损失,其中内部损失可区分为:轴向漏热损失,流体黏性损失,不可逆传热损失与流动传热耦合损失.本文对一台效率为55.7％的声学双作用型行波热声发动机进行了具体的(火用)损失分析,结果显示,回热器与谐振管是产生(火用)损失最多的部件.谐振管中的(火用)损失主要是流动损失,而回热器中的流动(火用)损失则相对较少.“,”Based on the classic thermoacoustic theory,this paper presents a comprehensive investigation of the acoustically-resonant double-acting traveling wave thermoacoustic heat engine through exergy analysis.The exergy destruction is split into internally lost exergy and externally lost exergy,while internally lost exergy mainly includes heat leak,viscous loss,imperfect heat transfer loss,and coupling loss with viscosity and imperfect heat transfer.The distribution of exergy destruction for a typical acoustically-resonant double-acting traveling wave thermoacoustic engine is researched in detail,whose exergy efficiency reaches 55.7％.The results demonstrate that most exergy destruction is caused by regenerator and resonator.Most of the lost exergy in the resonance tube is caused by viscosity,while the viscous loss just accounts for a little part in the regenerator.