Abstract Due to the single-side heating on the rectangular channel, the coolant faces a serious thermal stratification problem, and thus the heat transfer performance is reduced. To effectively improve flow and heat transfer characteristics, and weaken nonuniform distribution problem, a new cooling structure with combining fin and spherical convexity is built in this paper. The study results indicate that the new structure effectively reduced the maximum heat wall temperature, and weakened the fluid nonuniform distribution problem. Comparing with smooth channel and spherical convexity structure, the maximum temperature is decreased by 18.4% and 10.3%, and temperature nonuniform index is decreased by 25.1% and 20.8%. In addition, as the higher fluid temperature means the higher specific heat capacity, the new structure made full use of the heat sink of hydrogen, making the more heat can be quickly taken away from the heat wall. The thermal stratification phenomenon can be obviously weakened.

中文翻译：

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考虑热分层的超临界氢燃料流湍流传热分析

摘要 由于矩形通道上的单边加热，冷却剂面临严重的热分层问题，从而降低传热性能。为了有效改善流动和传热特性，削弱不均匀分布问题，本文构建了一种翅片和球面凸面相结合的新型冷却结构。研究结果表明，新结构有效降低了最高热壁温度，减弱了流体不均匀分布问题。与光滑通道和球形凸面结构相比，最高温度降低了18.4%和10.3%，温度不均匀指数降低了25.1%和20.8%。此外，由于流体温度越高意味着比热容越高，新的结构充分利用了氢的散热片，使得更多的热量可以快速地从热壁带走。热分层现象可以明显减弱。