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行波型热声驱动器的实验研究 总被引:2,自引:1,他引:1
热声驱动器是利用热声效应把热能转化为声能的动力装置,因其不含运动部件,具有结构简单和运行可靠等优点而倍受关注。本文研究的新型行波型热声驱动器在效率方面比驻波型热声驱动器有很大的提高。在简要回顾行波型热声驱动器的发展历史之后,详细介绍了一实验系统的结构和设计情况,并在研制成的实验装置上开展了初步的实验研究,成功获得了热声振荡,以氦气和氮气为工质,得到频率分别为66Hz和23Hz的压力振荡。此外,还考察了压力振幅受加热功率和加热温度的影响,以及安装喷射泵前后的对比实验情况。 相似文献
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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. 相似文献
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Thermoacoustic prime movers can generate pressure oscillation without any moving parts on self-excited thermoacoustic effect. The details of the numerical simulation methodology for thermoacoustic engines are presented in the paper. First, a four-port network method is used to build the transcendental equation of complex frequency as a criterion to judge if temperature distribution of the whole thermoacoustic system is correct for the case with given heating power. Then, the numerical simulation of a thermoacoustic-Stirling heat engine is carried out. It is proved that the numerical simulation code can run robustly and output what one is interested in. Finally, the calculated results are compared with the experiments of the thermoacoustic-Stirling heat engine (TASHE). It shows that the numerical simulation can agrees with the experimental results with acceptable accuracy. 相似文献