论文部分内容阅读
采用结构化六面体网格和k-ε湍流模型,求解三维N-S方程,对直冷却通道内置不同导流角α的V型扰流肋片在入口雷诺数为20 000时的空气流动与换热特性进行数值模拟。分析了不同肋片导流角度α对肋间壁面的换热效果和流动损失的影响,并对导流角度进行全局寻优。结果表明,带肋片直冷却通道的整体换热效果和综合冷却效率分别与肋片导流角α呈函数关系,肋片导流角α为47.25°的通道整体换热效果最好,α为31.57°时的通道综合冷却效率最佳,α为30°时通道内流动损失最小。
Using structured hexahedral mesh and k-ε turbulence model to solve the three-dimensional Navier-Stokes equations, the air flow and heat transfer characteristics of V-shaped spoiler with different diversion angles α at the inlet of the direct cooling channel were obtained. Numerical simulation. The influence of different fin angles α on the heat transfer and flow loss of the intercostal wall is analyzed, and the global optimum of the diversion angle is analyzed. The results show that the overall heat transfer efficiency and the overall cooling efficiency of the straight cooling channel with fins are functionally related to the fin conduction angle α. The heat transfer efficiency of the channel with the fin angle α of 47.25 ° is the best, α The best overall cooling efficiency is achieved at 31.57 °, with a minimum flow loss at 30 ° α.