X型桁架阵列通道流动及传热性能的数值研究

席雷; 徐亮; 高建民; 赵振; 李云龙

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X型桁架阵列通道流动及传热性能的数值研究

更新时间：2025-07-09

- X型桁架阵列通道流动及传热性能的数值研究
- 暂无标题
- 西安交通大学学报 2021年第8期页码：101-110
- 作者机构：
  
  西安交通大学机械制造系统工程国家重点实验室
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目（51876157）;陕西省自然科学基金资助项目（2019JM-096）
- DOI：
  中图分类号： TK124;TK471
- 纸质出版：2021
- 稿件说明：
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席雷, 徐亮, 高建民, 等. X型桁架阵列通道流动及传热性能的数值研究[J]. 西安交通大学学报, 2021,(8):101-110.
席雷, 徐亮, 高建民, 等. X型桁架阵列通道流动及传热性能的数值研究[J]. 西安交通大学学报, 2021,(8):101-110. DOI：

DOI：

摘要

为提高涡轮叶片中弦区的冷却效果

提出了一种力学性能优异、导热和对流传热性能均优良的X型桁架阵列结构

并填充于叶片中弦区内冷通道之中。采用耦合传热数值方法开展了X型桁架阵列冷却通道的数值模拟研究

分析了雷诺数(Re为10 000～60 000)、桁架杆直径比(d/D为0.037 5～0.075)、桁架杆夹角(α为30°～60°)和桁架杆倾角(β为15°～45°)对X型桁架阵列通道流动和传热性能的影响规律

拟合得到了有关X型桁架阵列通道流动和传热性能的经验关联式。研究结果表明:X型桁架通道的摩擦系数随雷诺数Re的增大以及桁架杆直径比d/D和夹角α的减小而降低

随倾角β的增大而先提高后又降低;在研究参数范围内

桁架杆表面平均努塞尔数大约是通道壁面平均努塞尔数的2.32～4.41倍;增大Re、d/D、α和β使得X型桁架阵列通道的整体平均努塞尔数有效提高;减小Re和d/D、增大α和β

使得X型桁架阵列通道的基于整体平均努塞尔数的综合热力系数有效提高。

Abstract

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Keywords

references

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