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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。
In this paper, by building a speaker-driven thermoacoustic engine visualization experimental platform, using particle imaging velocimetry (PIV) and infrared thermal imager to get the speed and temperature field distribution between the cold and hot side heat exchangers, Acoustic nuclear velocity and temperature field changes in the experimental study. The experimental results show that the applied acoustic field changes the basic pattern of thermal convection in the thermoacoustic nucleus and enhances the heat transfer between the cold and hot end heat exchangers, which has a significant effect on the temperature distribution in the thermoacoustic nuclei. Revealed the thermoacoustic nuclear flow and heat transfer law.