三棱锥体群几何参数对通道流动换热特性影响  

Influence of Geometric Parameters in Channels With Pyramidal Arrays on Flow and Heat Transfer Characteristics

作　　者：鲍锋 侯昶 李亚忠 BAO Feng;HOU Chang;LI Ya-Zhong(School of Aerospace Engineering,Xiamen University,Xiamen 361000,China)

机构地区：[1]厦门大学航空航天学院,厦门361000

出　　处：《工程热物理学报》2022年第1期173-181,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.11072206);福建省自然科学基金资助项目(No.2012J01023)。

摘　　要：为研究带三棱锥体群冷却通道的流动及换热特性,通过数值模拟的方式,给出了不同雷诺数下三棱锥体群横向列数,底面三角形腰长及底面三角形顶角大小对静止通道流动换热特性的影响规律。通道阻塞比为0.047,宽高比为1。结果表明:带三棱锥体群的通道在经过一定的优化设计后能够兼顾换热效果的改善和压力损失的减小;通道综合换热效率随横向列数的增大先增大后减小,随腰长的增大而增大,随顶角的增大先增大后减小;较优横向列数取值在3到6之间,腰长应尽可能大,较优顶角的取值在60°到70°之间。Numerical simulation was performed to study the flow and heat transfer characteristics of the turbine blade cooling channels with pyramidal arrays.Parameters were considered in the static channels under different Reynolds numbers,including the number of transverse rows,the waist length and the top angle of the bottom triangle.The blocking ratio of the squared channels was 0.047 and the aspect ratio was 1.Results reviewed that after the optimization,the channel with pyramidal arrays are conducive to the heat transfer effect and the reduction of pressure loss;the improvement of heat transfer effect and the reduction of pressure loss;the comprehensive heat transfer efficiency of the channel increases and then decreases with respect to the number of transverse columns,increases with the increase of waist length,increases and then decreases with the increase of top angle.The optimal values of transverse row number are between 3 and 6,the waist length favored the results,and the optimal top angles are between 60°and 70°.

关 键 词：涡轮叶片冷却 三棱锥体群 数值模拟 几何参数 

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]