探究椭圆形旋流管型对旋流冷却流动与传热特性的影响  

Investigations of Effects of Elliptical Passage Shape on Swirl Cooling and Heat Transfer Characteristics

作　　者：熊成岚 栾勇 饶宇[2,3] XIONG Chenglan;LUAN Yong;RAO Yu(SJTU-ParisTech Elite Institute of Technology,Shanghai Jiao Tong University,Shanghai 200240,China;Institute of Turbomachinery,Shanghai Jiao Tong University,Shanghai 200240,China;Shenzhen Research Institute,Shanghai Jiao Tong University,Shenzhen 518000,China)

机构地区：[1]上海交通大学巴黎高科学院,上海200240 [2]上海交通大学机械与动力工程学院,上海200240 [3]上海交通大学深圳研究院,深圳518000

出　　处：《工程热物理学报》2022年第10期2711-2717,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.11972230);上海市科委政府间国际科技合作项目(No.20110711000);深圳市科技计划资助项目(No.JCYJ20210324123404011)。

摘　　要：为了探究涡轮叶片前缘内部通道形状对旋流冷却流动与传热特性的影响,本文基于SST k–ω湍流模型,在射流雷诺数为12526~50104的范围内对有三个切向射流入口、短长轴比分别为0.8和0.6的两种椭圆形旋流冷却通道的流动与传热特性开展了数值计算研究,并将其与基准圆形旋流管在12倍直径长度范围内进行比较。研究结果表明,椭圆形旋流管具有更高的强化传热能力和更低的压力损失。在射流雷诺数为25052时,椭圆管在12D处的努塞尔数相较于圆形管降低了1.6%~19.8%,总换热量增加了13.2%~16.7%,压力损失降低了22.3%~62.4%。在相同射流入口雷诺数下,短长轴比为0.6的椭圆管的综合热性能最高,相对于圆形管增加了148.7%~177.8%。In order to explore the influence of internal passage shape on the swirl cooling flow and heat transfer characteristics, this paper numerically investigates the swirl cooling heat transfer,pressure loss and flow characteristics of the two elliptical swirl tubes with the ratio of short axis to major axis equal to 0.8 and 0.6, under the jet Reynolds numbers ranging from 12526~50104 with SST k–ω turbulence model, and they are compared with a circular swirl tube. The elliptical tubes show higher thermal performance and lower pressure loss. When the jet Reynolds number is 25052and with L = 12D, compared with the circular tube, the average Nusselt numbers of the elliptical tubes decrease by 1.6%~19.8% while the total heat exchange of the elliptical tube increases by13.2%~16.7%, and the pressure loss is reduced by 22.3%~62.4%. The elliptical tube with the ratio of short axis to major axis equals 0.6 shows the highest comprehensive thermal performance which is increased by 148.7%~177.8% than the circular tube under the jet Reynolds numbers studied.

关 键 词：旋流冷却 涡轮叶片内部冷却 通道形状 涡流 传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TK14[动力工程及工程热物理—热能工程]