中文摘要：

横断扰流结构微通道热沉是新型微通道结构的一种，其具体构型是在割断的直通道横断区布置扰流元，通过其对横断区流体的扰流冲击作用强化整个微通道的对流换热，扰流元与直通道段的长度、宽度及位置关系对微通道内流体流动与换热有重要影响．针对横断扰流结构微通道单相液体流动与传热特性，通过CFD计算流体力学模拟与分析软件进行全通道三维数值模拟．模型采用有限容积法、SIMPLE算法进行层流计算．计算及分析结果显示，当微通道进出口段均为5mm、换热段为10mm时，横断扰流结构微通道的最优换热尺寸为：L1／L2=4．1875且L2=0．4mm，W1=W2=0．35mm，0．5〈H2／H1〈1．

英文摘要：

The interrupted microchannel heat sink with spoilers in transverse zones is a novel structure. It consists of a set of separated zones adjoining parallel mierochannels and transverse microchambers with spoilers. The heat transfer enhancement depends strongly on the disturbed effect by the spoilers in transverse zones. The structural parameters, including the lengths and widths of the rectangular microchannel regions and the spoilers have an important influence on the behavior of fluid flow and heat transfer in the microchannel with spoilers in transverse zones. This paper reports an investigation of the influence of structural parameters with three-dimensional numerical simulation over the whole heat sink. The steady, laminar flow and heat transfer equations were solved by the finite-volume method. The analysis shows that when the lengths of inlet and outlet zones both are 5 mm and the heat transfer length is 10 mm, the optimized structural parameters are L1/L2 --4. 187 5, L2 = 0.4 mm, W1 = W2 = 0. 35 mm, and 0.5 〈 H2/H1 〈 1.