摘要
搭建一个实验测试平台,对回热器热声转换特性进行实验研究。实验系统由分别充当压缩机和发电机的多台直线电机及被测的回热器、换热器、热缓冲管等组成。实验对不同加热温度与声场条件下回热器的热声转换特性进行系统的研究。在平均压力为4 MPa时,实验获得的最大净输出声功为688 W,最大热声效率为34.2%。实验结果表明,在同等条件下,回热器加热温度越高,其输出声功越大,同时热声转换效率越高;回热器工作存在最优的声场条件,使其净输出声功与热声效率分别达到最大。
A test platform is built and the thermoacoustic conversion characteristic of the regenerator is experimentally investigated in this paper. The experimental system consists of linear motors and the tested regenerator, heat exchangers, thermal buffer tube and so on： Thermoacoustic conversion performance of the regenerator in different temperature gradients and acoustic fields is studied. With an average pressure of 4MPa, the maximum output acoustic power obtained in the experiment is 688 W and the highest thermoacoustic efficiency is 34.2%. The experimental results also indicated that in the same condition, the net output acoustic power and thermoacoustic efficiency both increase with the increase of the temperature gradients： An optimal acoustic field exists respectively for the maximum acoustic power and thermoacoustic efficiency in the regenerator.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2014年第11期2171-2176,共6页
Acta Energiae Solaris Sinica
基金
北京市自然科学基金面上项目(3132034)
国家高技术研究发展(863)计划(2012AA051102)
关键词
回热器
热声转换
加热温度
声场
regenerator, thermoacoustic conversion
temperature gradients
acoustic field
