截断肋排布方式对内冷通道换热性能的影响  

Effects of Arrangements of Truncated Ribs on Heat Transfer Performance in Internal Cooling Channel

作　　者：张国花 谢公南 SUNDEN Bengt 李书磊 ZHANG Guohua;XIE Gongnan;SUNDÉN Bengt;LI Shulei(School of Mechanical Engineering,Northwestern Polytechnical University,Xi’an 710072,China;School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China;Department of Energy Science,Lund University,Lund SE-22100,Sweden;Research&Development Institute of Northwestern Polytechnical University in Shenzhen,Shenzhen 518057,China)

机构地区：[1]西北工业大学机电学院,西安710072 [2]西北工业大学航海学院,西安710072 [3]隆德大学能源科学系,隆德SE-22100 [4]西北工业大学深圳研究院,深圳518057

出　　处：《南京航空航天大学学报》2021年第4期504-512,共9页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(51676163)资助项目;广东省基础与应用基础研究基金(2019A1515111146)资助项目;西北工业大学学位与研究生教育研究基金(2021AG52)资助项目。

摘　　要：在给定通道雷诺数的条件下,实验研究了矩形内冷通道中截断肋片在6种不同排布方式下的换热特性,并结合三维数值模拟方法,基于流动特征深入分析了其中的对流换热机理。研究表明:6种不同排布方式下,结构2-3-5-9通道的换热性能最好,结构2-5-3-9通道的换热性能最差;结构2-3-5-9通道的压力损失最大,结构2-5-9-3通道的压力损失最小。就总体热性能而言,结构2-9-5-3的最好,结构2-3-5-9的次之,结构2-5-3-9的最差。对流动特征的分析可知,肋片截断区域诱导的横向涡增强主流与边界层流体的掺混,强化了受热壁面与流体间的换热;截断肋片的不同方式排布使通道中流动特征不尽相同,但截断区域的涡结构基本相似。Experimental studies are carried out to investigate the heat transfer performance of six different arrangements of truncated ribs in internal cooling channel by fixing the Reynolds number.The convective heat transfer mechanisms of the considered cases are detailed and analyzed based on the fluid flow characteristics by using three dimensional numerical simulations.The results show that among six different arrangements of truncated ribs,Case 2-3-5-9 possesses the best heat transfer performance while Case 2-5-3-9 has the worst heat transfer performance.However,the pressure drop for Case 2-3-5-9 is the largest while it is the lowest for Case 2-5-9-3.In terms of overall thermal performance,Case 2-9-5-3 performs the best,followed by Case 2-3-5-9,and Case 2-5-3-9 performs the worst.Through analyzing the flow characteristics of different cases,it is found that the transverse vortices induced by the truncated regions in the truncated ribbed channel can result in strong flow mixing between the mainstream and boundary flow,which can enhance the heat transfer performance in the channel.In addition,different arrangements of truncated ribs lead to different flow characteristics in the internal cooling channels,but the vortices induced by the truncated regions look similar.

关 键 词：涡轮叶片 截断肋 总体换热性能 横向涡 压力损失 

分 类 号：V214[航空宇航科学与技术—航空宇航推进理论与工程]