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首页> 外文期刊>Journal of Heat Transfer >Effect of Constant Heat Flux Boundary Condition on Wall Temperature Fluctuations
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Effect of Constant Heat Flux Boundary Condition on Wall Temperature Fluctuations

机译：恒定热通量边界条件对壁温波动的影响

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An experimental study of the wall temperature fluctuations under different thermal-wall boundary conditions was carried out. Statistics obtained from the experiments are com- pared with existing experimental and numerical data. The wall temperature fields are also examined in terms of the coherent thermal structures. In addition the effect of the thermal entrance region on the wall temperature distribution is also studied. For water flow in a flume and in a rectangular channel, the mean spacing of the thermal streaks does not depend on the thermal entrance length and on the type of thermal-wall boundary condi- tions. The wall temperature fluctuations depend strongly on the type of wall thermal boundary conditions. Overall, the picture that emerges form this investigation confirms the hypothesis that moderate-Prandtl-number heat transfer at a solid wall is governed by the large-scale coherent flow structures.
机译：进行了不同热壁边界条件下壁温波动的实验研究。从实验获得的统计数据与现有的实验和数值数据进行比较。还根据相干热结构检查了壁温场。另外，还研究了热入口区域对壁温度分布的影响。对于在水槽和矩形通道中流动的水，热条纹的平均间距不取决于热入口长度和热壁边界条件的类型。壁温波动在很大程度上取决于壁温边界条件的类型。总体而言，从这项调查中得出的图像证实了以下假设：在固体壁上中等数量的普朗特数传热受大规模相干流动结构支配。

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