Numerical simulation on heat transfer and flow characteristics of three pin fin arrays with different solidity degrees are carried out by using SSTk-ωturbulence model. According to the structure of the cooling gas flow field, the influence of solidity degree on heat transfer and pressure loss coefficient in the cooling channel was analyzed. The result shows that, with the increasing solidity degree of the pin fin arrays, the kinetic energy of the cooling flow reduces, and its own speed exhibits a periodic distribution. The area of the endwall becomes smaller, but the area ratio of the low temperature area with higher heat transfer efficiency increases. The average heat transfer level of the pin fin arrays with different solidity degrees increases exponentially with the inlet Reynolds number, the high solidity array has a higher heat transfer effect, and there are two highest points appear in the upper and lower flow direction. The pressure loss coefficient decreases exponentially in different solidity degrees, the high solidity pin fin arrays decreases faster, and the pressure loss coefficient at high Reynolds number is the lowest, the pressure loss coefficient of the flow decreases firstly and then increases.%采用剪切压力传输SST k-ω湍流模型对3种不同实度扰流柱阵列的换热效果与流动特性进行数值模拟.根据冷却流体的流场结构,分析扰流柱实度对冷却通道内传热性能及压力损失系数的影响规律.结果表明:随着扰流柱阵列实度等级的增加,冷却气体动能降低,其流向速度呈周期性分布,通道内端壁面积缩小,但低温区域所占面积比重明显增大;扰流柱阵列的平均换热水平随进口雷诺数的增大呈指数上升趋势,高实度的扰流柱换热效果更佳,且在流场上下游分别出现换热峰值;冷却通道的整体压力损失系数随进口雷诺数的增大呈指数下降分布,高实度通道下降速率最大,其整体压力损失系数在高雷诺数阶段达到最低,在流向上沿程压力损失系数呈先降后升趋势.
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