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一、前言 近年来,为减少占地面积及某些布置上的原因,倾斜翅片管束的空冷器和热管换热器得到了应用。但是,人们对倾斜翅片管的传热性能和气流阻力还缺乏足够的研究。 本文在传热风洞上对两种规格的钢管绕铝翅片的单管进行了倾角为±45°、±60°、±75°、90°的试验研究,提出了在各种倾角下管外放热系数和气流阻力的计算式,以供设计空冷式和热珲式换热器参考。
I. Introduction In recent years, in order to reduce the floor space and some of the reasons for the arrangement, the air cooler and the heat pipe heat exchanger of the inclined finned tube bundle have been applied. However, there is still not enough research on the heat transfer performance and airflow resistance of the slant finned tube. In this paper, the heat transfer wind tunnel on the two specifications of the aluminum pipe around the single-finned tube tilt of ± 45 °, ± 60 °, ± 75 °, 90 ° of the test proposed in a variety of dip tube External heat release coefficient and flow resistance of the formula for the design of air-cooled and hot-air heat exchanger reference.