矩形冷却通道填充X型桁架阵列结构的布置方案研究  

Research on Layout Scheme of Rectangular Cooling Channel Filled with X-shaped Truss Array Structure

作　　者：席雷 高源 高建民[1] 徐亮[1] 赵振[1] 李云龙[1] XI Lei;GAO Yuan;GAO Jian-min;XU Liang;ZHAO Zhen;LI Yun-long(State Key Laboratory for Manufacturing Systems Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学机械制造系统工程国家重点实验室,西安710049

出　　处：《汽轮机技术》2023年第1期27-31,65,共6页Turbine Technology

基　　金：陕西省自然科学基础研究计划青年项目(2022JQ-545);中国博士后科学基金资助项目(2021M702573)。

摘　　要：采用数值模拟方法开展了矩形冷却通道填充X型桁架阵列结构的布置方案研究,分析了2种桁架布置方式(连续X型和离散双X型)、4种双X型桁架间距(P/S=1.5、P/S=1.0、P/S=0.5和P/S=0)以及2种双X型桁架布置方向(方向1和方向2)等方案下矩形冷却通道的流动与传热性能。研究结果表明:与布置连续X型桁架的通道相比,布置离散双X型桁架的通道具有更好的传热性能和综合热力性能,其平均努塞尔数和综合热力系数分别提高了7.05%和1.06%。随着双X型桁架间距的减小,通道的平均努塞尔数、摩擦系数和综合热力系数都呈现出先略有减小后又逐渐增大的变化规律。当双X型桁架间距为P/S=0.5时通道的流动性能最好,当双X型桁架间距为P/S=0时通道的传热性能和综合热力性能都最佳。与方向2相比,桁架布置为方向1时通道具有更好的传热性能和综合热力性能。The numerical simulation method was used to carry out the research on the layout schemes of the rectangular cooling channel filled with X-shaped truss array structure.The flow and heat transfer performance of the rectangular cooling channel was analyzed for two kinds of truss layout schemes(continuous X-shaped and discrete double X-shaped),four truss spacing(P/S=1.5,P/S=1.0,P/S=0.5 and P/S=0)of double X-shaped truss,and twolayout directions(direction 1 and direction 2)of double X-shaped truss.The results show that compared with the channel with continuous X-shaped truss,the channel with discrete double X-shapedtruss has better heat transfer performance and comprehensive thermal performance,and its average Nusselt number and comprehensive thermal coefficient are increased by 7.05%and 1.06%respectively.With the decrease in double X-shaped truss spacing,the average Nusselt number,friction coefficient and comprehensive thermal coefficient of the channel show a change law of slightly decreasing at first and then gradually increasing.When the double X-shaped truss spacing is P/S=0.5,the flow performance of the channel is the best When the double X-shaped truss spacing is P/S=0,the heat transfer performance and comprehensive thermal performance of the channel are the best.Compared with direction 2,the channel with truss structure arranged in direction 1.0 has better heat transfer performance and comprehensive thermal performance.

关 键 词：涡轮叶片 矩形通道 桁架结构 布置方案 流动与传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TK471[动力工程及工程热物理—热能工程]