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| Study on the basic experimental rig for thermoacoustic system |
| ZHAO Rui-dong1,2, WU Zhang-hua1, LUO Er-cang1, DAI Wei1 |
1. Key Laboratory of Cryogenics, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract For conveniently investigating the performance of core thermoacoustic components (such as regenerator) in different acoustic field and finding the optimal structure or working conditions, a novel experimental rig for thermoacoustic system was proposed. By use of linear motors, controllable regulation of acoustic field in the system was realized. The regulation methods and characteristic of the system acoustic field were analyzed by theory and numerically simulation. Finally, preliminary experiments were given to verify the scheme. Theoretical analysis results show that moving mass and resistance of load alternator are the main means to regulate the acoustic field. Subsequently numerical simulation results show that the influence of moving mass is larger than resistance. By optimization, the maximum net output acoustic power and thermoacoustic efficiency of 361 W and 39.1% are obtained respectively. Finally, the experimental results show that present scheme is feasible and has the same trend with numerical results.
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Published: 01 February 2013
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热声系统基础实验台模拟
为了方便地研究回热器等热声关键部件在不同声场下的工作性能,寻找部件最优的结构参数及工作条件,提出一种热声基础实验平台.引入双电机实现系统中声场的可控调节,通过理论及数值计算分析系统内部声场的主要调节方式及特性,并对该方案进行初步实验验证.理论分析结果表明负载电机动质量与外接电阻是调节系统声场的主要方式,之后的数值模拟结果表明负载电机动质量对系统性能的影响大于外接电阻.通过数值优化,系统获得的最大净输出声功及热声效率分别为361 W与 39.1%.最后初步的实验结果表明所提出的实验方案可行,与数值计算趋势一致.
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