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基于多级设计概念的肋化内冷通道流动换热特性

刘国庆 郑少飞 杨燕茹 李海旺 王晓东

刘国庆, 郑少飞, 杨燕茹, 等. 基于多级设计概念的肋化内冷通道流动换热特性[J]. 航空动力学报, 2024, 39(10):20220861 doi: 10.13224/j.cnki.jasp.20220861
引用本文: 刘国庆, 郑少飞, 杨燕茹, 等. 基于多级设计概念的肋化内冷通道流动换热特性[J]. 航空动力学报, 2024, 39(10):20220861 doi: 10.13224/j.cnki.jasp.20220861
LIU Guoqing, ZHENG Shaofei, YANG Yanru, et al. Fluid flow and heat transfer of ribbed channel based on the hierarchical design concept[J]. Journal of Aerospace Power, 2024, 39(10):20220861 doi: 10.13224/j.cnki.jasp.20220861
Citation: LIU Guoqing, ZHENG Shaofei, YANG Yanru, et al. Fluid flow and heat transfer of ribbed channel based on the hierarchical design concept[J]. Journal of Aerospace Power, 2024, 39(10):20220861 doi: 10.13224/j.cnki.jasp.20220861

基于多级设计概念的肋化内冷通道流动换热特性

doi: 10.13224/j.cnki.jasp.20220861
基金项目: 航空发动机及燃气轮机基础科学中心项目(P2022-B-Ⅱ-029-001); 国家自然科学基金(52006064)
详细信息
    作者简介:

    刘国庆(1997-),男,硕士生,主要从事涡轮叶片内冷通道流动与换热研究。E-mail:XTU18390210192@outlook.com

    通讯作者:

    郑少飞(1990-),男,讲师,博士,主要从事强化换热与冷却技术研究。E-mail:shaofeizheng@ncepu.edu.cn

  • 中图分类号: V231.1

Fluid flow and heat transfer of ribbed channel based on the hierarchical design concept

  • 摘要:

    利用数值仿真方法,研究了4种肋片构型(直肋、斜肋、V肋和反V肋)和两种设计方法(均匀设计和多级设计)下肋化通道的流动换热特性,进一步明确多级设计概念的有效性和适用性。结果表明:采用多级设计后,4种肋片构型的换热性能均有不同程度的下降,其中直肋降幅最小(低于3.00%),斜肋降幅最大(达到12.76%);流动阻力展现出标志性的下降,其中直肋减阻效果最差,摩擦因子降低36.15%~37.67%,反V肋实现最佳的减阻效果,摩擦因子降低46.98%~50.32%;最终,多级设计有效地增强了肋化通道综合冷却效果,在雷诺数为100000时,与现有均匀设计相比,基于多级设计的反V肋综合性能因子(Nu/Nu0)/(f/f0)提高81.29%。分析表明,沿着流动方向线性减少的肋片尺寸,一方面有效地抑制二次流动,另一方面促使主流产生下压效应,强化壁面流体冲击效果,进而在轻微损失换热性能的基础上,实现标志性的减阻效果。

     

  • 图 1  内冷通道整体模型

    Figure 1.  Schematic diagram of the internal cooling channel

    图 2  肋片排布方式示意图

    Figure 2.  Schematic of the rib arrangement

    图 3  近肋区域网格示意图

    Figure 3.  Computation grids near ribs

    图 4  Re=80000时,沿流动方向第3级和第4级肋片间底壁面上局部努塞尔数对比[20]

    Figure 4.  Comparison of the local Nu distributions of the bottom wall between row 3 and row 4 along the streamwise direction at Re=80000[20]

    图 5  不同Re下肋化通道Nu/Nu0f/f0对比

    Figure 5.  Nu/Nu0 and f/f0 at different Re

    图 6  底部壁面温度云图

    Figure 6.  Temperature distributions on the bottom wall of the channel

    图 7  底面局部平均Nu

    Figure 7.  Local averaged Nu on the bottom wall

    图 8  通道流向截面上流线与速度云图

    Figure 8.  Streamline and velocity contour on the central streamwise plane of the channel

    图 9  第7级和第8级肋片间通道截面流线与速度云图

    Figure 9.  Streamline and velocity contour on the transverse section of the channel between row 7 and row 8

    图 10  底壁面流线与湍动能分布

    Figure 10.  Distributions of streamlines and turbulent kinetic energy on the bottom wall of the channel

    图 11  综合换热性能

    Figure 11.  Comprehensive heat transfer performance

    表  1  不同模型设计方案

    Table  1.   Different configurations of the rib arrangement

    模型方案 肋片型式 是否采用
    多级设计
    直肋-均匀 直肋
    直肋-多级 直肋
    斜肋-均匀 斜肋
    斜肋-多级 斜肋
    V肋-均匀 V形肋
    V肋-多级 V形肋
    反V肋-均匀 反V形肋
    反V肋-多级 反V形肋
    下载: 导出CSV

    表  2  网格无关性验证

    Table  2.   Mesh independence verification

    网格数量/106 Nu 相对偏差/%
    1.97 183.53 −33.10
    2.68 243.00 −0.52
    4.00 243.96 −0.13
    5.75 244.26 0
    下载: 导出CSV
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  • 收稿日期:  2022-11-13
  • 网络出版日期:  2024-03-20

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