Abstract Laminarization of the turbulent flow of Helium in a heated vertical finned tube was studied using a low-Reynolds number turbulence model. The study was carried out for an inlet Reynolds number of 6000, a non-dimensional wall heat flux value of 0.003, the number of fins ranging from 8 to 24, and non-dimensional fin height ranging from 0.1 to 0.3. Reductions in turbulent kinetic energy production and low-velocity regions in the inter-fin region are observed which promoted laminarization. Also, for low Reynolds number turbulent flow with large heat fluxes, the finned tubes are found to offer comparatively lower heat transfer enhancement at the expense of a larger pressure drop penalty.

中文翻译：

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加热垂直翅片管中湍流层化

摘要 使用低雷诺数湍流模型研究了加热垂直翅片管中氦湍流的层流化。该研究针对入口雷诺数为 6000、无量纲壁面热通量值为 0.003、翅片数量范围为 8 到 24 以及无量纲翅片高度范围为 0.1 到 0.3 进行的。观察到鳍间区域的湍动能产生和低速区域的减少，这促进了层状化。此外，对于具有大热通量的低雷诺数湍流，发现翅片管以更大的压降损失为代价提供相对较低的传热增强。