椭圆形扰流柱冷却通道流动与换热数值研究  

Numerical simulation on flow and heat transfer of elliptical pin-fins in cooling channel

作　　者：邓丁元[1] 高行山[1] 虞跨海[1] 岳珠峰[1] 

机构地区：[1]西北工业大学力学与土木建筑学院工程力学系,西安710129

出　　处：《航空动力学报》2010年第7期1545-1552,共8页Journal of Aerospace Power

基　　金：国家高技术研究发展计划(2007AA04Z404);国家自然科学基金(50375124);教育部博士点基金(N6CJ0001);高等学校学科创新引智计划(B07050)

摘　　要：采用数值计算方法对涡轮叶片椭圆形扰流柱排冷却通道的流动和换热进行了研究,得到了排列间距、迎角、椭圆长短轴之比等因素对冷却通道流动和换热性能的影响.在相同截面积和排列方式条件下,椭圆形扰流柱迎角为0°时,分析结果表明,椭圆形扰流柱冷却通道压力损失系数约为圆形扰流柱通道的51.7%,平均努塞尔数约为圆形扰流柱通道的83.75%;长短轴比为5/1.8时,压力损失系数仅为圆形扰流柱通道的(长短轴比等于3/3)28.1%～35.5%,平均努塞尔数为圆形扰流柱通道的71.1%～75.06%.Numerical simulation was conducted to investigate the flow and heat transfer performance of elliptical pin-fin arrays in turbine blade cooling channel.Then,the impacts of array spacing,angle of attack,ratio of long axis and short axis on flow and heat transfer in pin-fins channel were obtained.The result indicates that,when the angle of attack is 0°,the pressure loss coefficient and average Nusselt number of elliptical pin-fins channel is about 51.7% and 83.75%,respectively,of the same fin section-area and arrays circular pin-fins channel;when the ratio of long axis and short axis is 5/1.8,the pressure loss coefficient is only 28.1%～35.5% of circular pin-fins channel（ratio of long axis and short axis is 3/3）,and average Nusselt number is 71.1%～75.06% of circular pin-fins channel.

关 键 词：椭圆形扰流柱 排列间距 迎角 压力损失 换热特性 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]