矩形窄缝流道角部结构对流动和传热的影响

为了深入了解矩形窄缝通道角部结构对流动和传热的影响,文中采用CFD程序CFX10.0对矩形窄缝通道的流场和温度场进行了数值模拟.研究结果表明,采用削薄角部金属固体,并且在发热固体总量基本相同的条件下,直角型和圆角型结构下的内壁面温度分布与原型结构相差不大,可以反映原型结构中的传热特性.在雷诺数相同的条件下,角部圆角型结构和直角型结构下的二次流分布和摩擦压降基本相同,表明了完全可以采用圆角型结构来模拟原型结构.

Effect of the configuration of the corner in a narrow rectangular channel on flow and heat transfer

In order to further understand the effect of the configuration of the corner in a narrow rectangular channel on flow and heat transfer, flow field and temperature field in a narrow rectangular channel were numerical simulated by using CFD code CFX10. 0. The results show under the condition of equal quantity of heat of solid which is obtained by decreasing the solid of the corner, the distributions of inside wall temperature for the orthogonal and circular type configurations of the corner are almost the same as that of the archetypal configuration, and those can simulate heat transfer of the archetypal configuration. Under the condition of equal Re, secondary flow and friction pressure of the orthogonal type configuration are almost the same as those of the circular type configuration, which shows that the circular type configuration of the corner in a narrow channel can substituted for the archetypal configuration to simulate flow and heat transfer in a narrow rectangular channel.