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首页> 外文期刊>Heat transfer >Maximization of heat transfer density from a single-row cross-flow heat exchanger with wing-shaped tubes using constructal design
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Maximization of heat transfer density from a single-row cross-flow heat exchanger with wing-shaped tubes using constructal design

机译：利用翼形管使用构造设计，从单排交叉流动热交换器的传热密度最大化

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摘要

A single-row cross-flow heat exchanger with wing-shaped tubes is designed in this paper using the constructal design method. The wing-to-wing spacing and the wing thickness are free to morph while the chord of the wings remains constant. Wing-to-wing spacing optimization or heat transfer density maximization from the wings is the objective function in this design. Two directions of the free-stream (incoming) flow are considered. The right- and left-flow directions are considered with a constant drop in pressure. All wings are heated at a uniform temperature, and the air is used to cool these wings. The two-dimensional conservation of mass, conservation of momentum, and the conservation of energy equations are solved by means of the finite volume method for steady and incompressible flow. The ratio of the wing thickness to the chord (dimensionless wing thickness) is changed from 0.2 to 1. For each wing thickness, three Bejan numbers (Be = 10~3, 10~4, and 10~5) are used in the numerical simulation. The results revealed that in the case of the flow direction to the left, the maximum heat transfer density is higher than that in the case of. the flow direction to the right for all wing thicknesses and all Bejan numbers.
机译：本文采用了构造设计方法，设计了具有翼状管的单排交叉流动热交换器。翼形翼间距和机翼厚度是自由变形，而翅膀的弦保持恒定。翼翼间距优化或翼的传热密度最大化是该设计中的目标函数。考虑自由流（进入的）流的两个方向。右侧和左流动方向被认为是恒定压力的。所有翅膀都在均匀的温度下加热，并且空气用于冷却这些翼。通过用于稳定和不可压缩的流动的有限体积方法，解决了质量，守恒和能量方程的维护和能量方程的守恒的二维节约。对于每个翼厚，在数值中使用三个Bejan数（Be = 10〜3,10〜4和10〜5），翼厚度与弦（无量纲翼厚度）的比率从0.2变为1.。模拟。结果表明，在流动方向向左的情况下，最大传热密度高于此小的热传递密度。所有翼厚度和所有BEJAN编号的右侧的流动方向。

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