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本文利用全息测温技术研究了小Ra数时具有不同间距的水平同心套管内的自然对流问题.在Ra 数较小且基本保持不变的条件下,套管间距仍对水平夹套内的自然对流有明显的影响.这是一种值得进一步研究的有趣的物理现象.本文的研究结果可用于以空气为隔热材料的隔热保温技术.
In this paper, the holdup temperature measurement technique is used to study the natural convection problem in horizontal concentric tubes with different pitch when the Ra number is small. Under the conditions of small and almost constant Ra number, Convection has a significant impact.This is an interesting physical phenomenon worthy of further study.The results of this paper can be used for thermal insulation technology using air as insulation material.