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本文以圆管管翅式散热器为研究对象,采用数值模拟的方法对圆管管翅式散热器肋侧空气通道主流方向绝对涡通量的特性进行了探讨。给出了肋侧空气通道主流方向绝对涡通量无量纲化参数,二次流雷诺数;横向管间距、肋侧空气流动雷诺数对二次流雷诺数及努塞尔数的影响。“,”The characteristics of absolute vortex flux along the main flow direction in a channel formed by tube bank plain fins were studied using numerical simulation method in this paper.A dimensionless parameter of absolute vortex flux along the main flow direction,Reynolds number of secondary flow was provided;the effects under different transverse spacing and Reynolds number of air in the channel formed by tube bank plain fins on the Reynolds number of secondary flow and Nusselt number were presented.