阵列冲击冷却传热特性数值研究

Numerical Study on Heat Transfer Characteristics of Array Impact Cooling

摘要: 为了探索对热端部件的高效冷却方式，本文通过数值计算对阵列冷却结构的换热特性进行了研究。首先，对五种增强冲击靶面冷却换热效果的因素分别进行研究，其次，将这五种强化传热因素结合起来研究冲击靶面的换热强度。计算结果表明提高靶面的冲击雷诺数，选择合理的冲击孔径及冲击间距，设定左右两侧出气方式，增加气膜出流孔结构都可以相应提升冲击靶面的换热强度，其中，以冲击雷诺数及冲击孔径影响最大；将高雷诺数、冲击孔径、冲击间距、左右两侧出气方式及气膜出流孔五种因素结合起来，可以实现整体大幅度提升靶面的冷却换热效果。

Abstract: To explore efficient cooling methods for hot-end parts, the heat transfer characteristics of array cooling structures are studied by numerical calculation. Firstly, five factors that enhance the cooling and heat transfer effect of impact target surface are studied respectively. Secondly, the heat transfer intensity of impact target surface is studied by combining these five factors that enhance heat transfer. The calculation results show that increasing the impact Reynolds number of the target surface, selecting a reasonable impact aperture and impact spacing, setting the air outlet modes on both sides, and increasing the structure of air film outlet holes can enhance the heat transfer intensity of the impact target surface. Among them, the impact Reynolds number and im-pact aperture have the greatest impact. By combining the five factors of high Reynolds number, impact aperture, impact distance, air outlet mode on both sides and air film outlet hole, the cooling and heat transfer effect of the target surface can be greatly improved.