摘要
为优化柱肋阵列冷却效果,通过缩小柱肋阵列中局部柱肋直径得到3种非等直径柱肋阵列通道。采用瞬态液晶测试技术和数值模拟方法研究了其传热和流阻特性。结果表明:保持奇数排柱肋直径的大小,仅减小偶数排的直径,能在传热减弱不多的情况下,使通道的流动阻力大幅降低。适当调整奇/偶数排柱肋的直径,雷诺数为10 000~50 000,奇偶数排柱肋直径比为1.4的非等直径柱肋阵列通道,其平均传热系数仅减小了约6%,而阻力系数则减小了约21%。
Three pin-fin array with non-uniform diameters were considered for the purpose of cooling characteristics optimization. Combined method of transient liquid crystal technique test and numerical simulation was employed to investigate their heat transfer and pressure drop characteristics. The results showed that low pressure drop can be achieved when downsizing several rows of pin-fin diameters with a small cost of heat transfer loss. Within the Reynolds number from 10 000 to 50 000, the pin-fin array with 1.4-folds diameters ratio between odd and even rows caused just 6% decrease on average heat transfer factor, however, its friction factor declined as large as 21%.
作者
白万栋
梁栋
陈伟
CHYU Minking
BAI Wandong;LIANG Dong;CHEN Wei;CHYU Minking(School of Aeronautics and Astronautics,Sichuan University,Chengdu 610065,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2021年第3期626-633,共8页
Journal of Aerospace Power
基金
国家自然科学基金(51876132)
中央高校基本科研业务费专项(YJ201761)。
关键词
涡轮叶片
内部冷却
柱肋阵列
强化传热
流阻优化
turbine blade
internal cooling
pin-fin array
heat transfer enhancement
flow resistance optimization
