本文通过搭建扬声器驱动的热声热机可视化实验台,利用粒子成像测速仪（PIV）和红外热像仪得到冷、热端换热器间速度及温度场分布,对有无声场两种情况下热声核中速度及温度场的变化进行了实验研究。实验结果表明,外加声场改变了热声核中热对流的基本模式,增强了冷热端换热器间的换热能力,对热声核中的温度分布有着显著的影响。揭示了热声核中的流动与换热规律。
A visual thermoacoustic engine was built.The velocity and temperature fields between hot and cold heat exchangers were studied under two conditions with and without acoustic field using particle image velocimetry and thermal infrared imager.The experiment results show that the heat convection model was changed with the addition of acoustic,and heat transfer was enhanced under the disturbance of acoustic flow.The temperature and velocity distributions of thermoacoustic core were significantly affected by the acoustic.The flow and heat transfer characteristics of thermoacoustic core were analyzed.
参考文献
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