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以旋转圆筒型热工设备为研究对象,设计了大直径水平旋转圆筒实验装置.利用微型热电偶,测量了高格拉晓夫数(1×108)下圆筒表面各个方位角处空气热边界层的温度分布.实验结果表明:旋转对圆筒表面0°和180°处的局部对流传热系数的影响有明显差异;旋转使得圆筒表面温度和局部对流传热系数的分布不均匀,尤其当旋转雷诺数大于临界雷诺数时的影响尤为突出.确定了临界雷诺数的准则数关联式.
In this paper, a large-diameter horizontal rotating cylinder experimental apparatus was designed with rotating cylindrical thermal equipment as the research object.At the same time, the air heat at each azimuth of the cylinder surface at high Gramesov-1 (1 × 108) Boundary layer.The experimental results show that the effects of rotation on the local convective heat transfer coefficients at 0 ° and 180 ° are obviously different.The rotation makes the distribution of cylinder surface temperature and local convective heat transfer coefficient uneven, Especially when the rotating Reynolds number is greater than the critical Reynolds number, the impact is particularly prominent.