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首页> 外文期刊>International Journal of Heat and Mass Transfer >Peripheral fins for blockage robustness
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Peripheral fins for blockage robustness

机译：外围鳍片可增强坚固性

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摘要

A peripheral finned-tube, cross-flow heat exchanger (evaporator) is briefly introduced that allows for uninterrupted and effective air flow in the presence of condensate or frost. The peripheral fins are connected to tubes with radial fins and the surface areas of both radial and peripheral fins allow for surface-convection heat transfer. The peripheral fins have a staggered arrangement to allow for alternate air flow paths in the presence of a blockage. Optimized fin structure is sought using one-dimensional fin models. The peripheral fins allow for significant surface-convection by using the stagnation-flow regions as well as the boundary-layer break ups. The CFD results show that the peripheral fins mitigate the pressure drop penalty due to blockages and in this regard present an advantage over the conventional fins. CFD results show that fin pitch can be optimized. The anisotropy of the peripheral fin structure may also allow for easy drainage of the condensate along the tubes when tubes are along gravity.
机译：简要介绍了周边的翅片管错流热交换器（蒸发器），该冷凝器允许在存在冷凝水或霜冻的情况下实现不间断的有效空气流通。外围散热片连接到带有径向散热片的管，并且径向散热片和外围散热片的表面积都允许表面对流传热。外围翅片具有交错的布置，以在存在堵塞的情况下允许交替的空气流动路径。使用一维鳍片模型寻求优化的鳍片结构。通过使用滞流区域以及边界层破裂，外围鳍片可实现显着的表面对流。 CFD结果表明，外围散热片减轻了由于堵塞引起的压降损失，在这方面，与传统散热片相比，它具有优势。 CFD结果表明，鳍片节距可以优化。当管子沿重力方向流动时，外围翅片结构的各向异性还可以使冷凝水沿管子容易排出。

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