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设计搭建了端部周期加热时管内气体热声对流的实验平台,对端部周期加热引起的气体热声对流作用下管内气体的温度分布进行了实验研究。该实验以氩气为工质,利用三极管控制加热电路实现周期性加热;测量了不同加热频率下管内的气体温度,并与常热流加热时的温度分布进行对比,结果表明端部周期加热时管内气体的温度分布与同功率下常热流加热时存在明显的差异,并且在某些测点出现了温度的奇异分布。本实验验证了超温现象的存在,为管内气体热声对流现象的进一步研究奠定了基础。
The experimental platform for the thermoacoustic convection of the gas in the pipe during the periodical heating was designed and constructed. The temperature distribution of the gas in the pipe under the thermoacoustic convection caused by the periodic heating was experimentally studied. The experimental argon gas as the working fluid, the use of transistors to control the heating circuit to achieve periodic heating; measured under different heating frequency gas tube temperature, and the constant heat flow when the temperature distribution compared, the results show that the end of the heating cycle tube There is a clear difference between the gas temperature distribution and the normal heat flow at the same power, and the singular temperature distribution appears at some measuring points. The experiment verifies the existence of over-temperature phenomenon, which lays the foundation for the further study of thermoacoustic convection in gas pipe.