【摘要】 提出一种新的针肋结构,采用直径为0．25 mm的圆柱型针肋,在一定的错排和顺排相结合的优化布置方式下,能获得较高的换热效率。在三维空间上的对流换热模拟表明,铜制的针肋结构的换热系数要高出百叶窗翅片24％-34％,而流阻仅高出10％-16％。总换热量取决于翅片材料的导热性能,导热系数越高,针肋的强化作用约明显。本文提出的针肋翅片结构可以用来制造紧凑性更高的换热器。更多还原

【Abstract】 Presented a new kind of pin fin structures using cylindrical pin fins with diameters of 0.25 mm arranged in some optimized arrays. The 3-D numerical prediction proved that the copper pin fin structures have 24%-34% higher convection heat transfer coefficients with 10%-16% pressure drop increase. However, when made of aluminum, the pin fins have only 15%-20% heat transfer coefficients higher than those for the louvered fins, while the pressure drops are not influenced by the material properties.更多还原