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涡流发生器强化传热的数值模拟

ISSN号：0493-2137
期刊名称：《天津大学学报：自然科学与工程技术版》
时间：0
分类：TK124[动力工程及工程热物理—工程热物理;动力工程及工程热物理—热能工程]
作者机构：[1]天津大学化工学院,天津300072, [2]化学工程联合国家重点实验室(天津大学),天津300072, [3]天津化学化工协同创新中心,天津300072
相关基金：国家重点基础研究发展计划(973计划)资助项目(2012CB720500).

作者：原平方[1,2,3], 张婷[1,2,3], 齐文哲[1,2,3], 郭凯[1,2,3], 张小波[1,2,3], 刘春江[1,2,3]

关键词：涡流发生器, 强化传热, 结构优化, 数值模拟, 不对称分布, vortex generator, heat transfer enhancement, structure optimization, numerical simulation, asymmetrical distribution

中文摘要：

通过CFD模拟，对三角翼涡流发生器的流动和换热性能进行了研究．提出三角翼不对称布局和三角翼椭圆开孔结构，并针对三角翼的边长进行了优化分析．结果表明：三角翼不对称分布(ABA布局)时传热效果优于对称分布(AB布局)；三角翼边长对强化传热影响复杂，但随着边长增大，压力系数增加；三角翼开椭圆孔结构比开圆孔结构的强化效果更优，且压力阻力更小，因而椭圆孔相比圆孔能更有效地强化总传热性能．

英文摘要：

The flow characteristics and heat transfer performance of triangular vortex generator were numerically investigated by using computational fluid dynamics(CFD) software.The asymmetrical distribution of delta wing vortex generator was introduced,together with the structure of delta wing vortex generator with elliptic holes.Meanwhile,the length of delta wing vortex generator was optimized.The results show that the asymmetrical layout of vortex generator(ABA type)performs better in heat transfer enhancement than the symmetric distribution(AB type).The effect of length on heat transfer enhancement is complex,and the pressure coefficient increases as the length becomes longer.Compared with the delta wing vortex generator with circular holes,the delta wing vortex generator with elliptic holes has better heat transfer performance and lower pressure resistance as well.Hence,the elliptic hole has more active effect on the overall heat transfer enhancement than the circular hole.