【作者】 张靖周； 王奉明； 王锁芳；

【Author】 ZHANG Jing-zhou WANG Feng-ming WANG Suo-fang(College of Energy and Power, Nanjing University of Aeronauticsand Astronautics, Nanjing 210016, China)

【机构】 南京航空航天大学能源与动力学院；

【摘要】 运用FLUENT-CFD商用软件对带有圆形、准水滴形、椭圆形和水滴形等四种扰流柱叉捧阵列矩形通道内流动和换热过程进行了三维数值模拟,获得了通道内流场、压力场以及璧面温度场的基本特征,并对其强化换热特性和压力损失特性进行了对比分析。计算结果表明:装有水滴形扰流柱阵列的矩形通道压力损失仅为前三者的41.1%、70.5%和79.8%,而恒热流壁面的平均对流换热系数相对于前三者而言仅分别降低13.4%、1.9%和26%,可见压力损失降低的幅度明显高于强化换热的减弱。水漓形扰流柱是一种实现高冷却低流阻、替代常规圆形扰流柱的理想结构。更多还原

【Abstract】 FLUENT software is used to simulate the flow and heat transfer process in rectangular passage with staggered arrays of circle-shaped、 similar-drop-shaped, elliptic-shaped and drop-shaped pin fins. The velocity fields, pressure fields, temperature fields and the local convective heat transfer coefficients are obtained and the enhancement of heat transfer and the pressure loss characteristics with different fin pins are compared. It is found that the pressure loss of drop-shaped fin pins is 41.1%, 70.5% and 79.8% of the former three fin pins respectively while the average heat transfer coefficient on the uniform heat flux endwal decreases 13.4%, 1.9% and 2.6% compared with the former three fin pins, respectively. The wall heat transfer enhancement capability reduced weakerly than the pressure loss. So that the drop-shaped fin pins is a promising alternative configuration to circle-shaped fin pins.更多还原