【摘要】 采用Fluent软件对矩形翅片椭圆管束空气侧的对流换热情况进行了三维数值模拟,获得了不同流速下翅片表面温度分布,分析了迎面风速与换热系数之间的关系,随着速度的增大,空气侧的换热系数增加,并拟合了换热计算公式。同时分析了不同翅片间距对换热的影响因素,随着翅片间距的增大,空气侧换热系数增加,而且随着Re数的增加,换热的强化更加明显。更多还原

【Abstract】 The air-side heat transfer of rectangular fins in an elliptic-tube heat exchanger is investigated numerically by the software of FLUENT.The fins surface temperature contour charts and heat transfer coefficient table at different upstream velocities are obtained.The influence of the air velocity on the surface temperature and heat transfer are analyzed.The results indicated that the heat transfer coefficient increases with increasing cooling air velocity.With increasing fin spacing,the heat transfer coefficient increases,and the enhancement of heat transfer was significant when Re increases as well.更多还原