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Influence of stack geometry and resonator length on the performance of thermoacoustic engine

机译：烟囱几何形状和谐振器长度对热声发动机性能的影响

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摘要

Thermoacoustic engines convert heat energy into high amplitude sound waves, which is used to drive thermoacoustic refrigerator or pulse tube cryocoolers by replacing the mechanical pistons such as compressors. The increasing interest in thermoacoustic technology is of its potentiality of no exotic materials, low cost and high reliability compared to vapor compression refrigeration systems. The experimental setup has been built based on the linear thermoacoustic model and some simple design parameters. The engines produce acoustic energy at the temperature difference of 325-450 K imposed along the stack of the system. This work illustrates the influence of stack parameters such as plate thickness (PT) and plate spacing (PS) with resonator length on the performance of thermoacoustic engine, which are measured in terms of onset temperature difference, resonance frequency and pressure amplitude using air as a working fluid. The results obtained from the experiments are in good agreement with the theoretical results from DeltaEc.
机译：热声引擎将热能转换为高振幅声波，该声波通过替换机械活塞（例如压缩机）来驱动热声制冷机或脉冲管低温冷却器。与蒸汽压缩制冷系统相比，人们对热声技术的兴趣越来越大，因为它具有无异物，低成本和高可靠性的潜力。实验设置是基于线性热声模型和一些简单的设计参数而建立的。发动机沿着系统烟囱产生的325-450 K温差产生声能。这项工作说明了诸如谐振器长度的板厚度（PT）和板间距（PS）之类的堆参数对热声发动机性能的影响，这些参数是根据起始温度差，谐振频率和压力振幅（以空气为燃料）进行测量的。工作液。从实验中获得的结果与DeltaEc的理论结果非常吻合。

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