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变温循环冷气对涡轮导叶寿命影响

陈英涛 梁书伟 艾延廷 梁子键

陈英涛, 梁书伟, 艾延廷, 等. 变温循环冷气对涡轮导叶寿命影响[J]. 航空动力学报, 2024, 39(10):20220834 doi: 10.13224/j.cnki.jasp.20220834
引用本文: 陈英涛, 梁书伟, 艾延廷, 等. 变温循环冷气对涡轮导叶寿命影响[J]. 航空动力学报, 2024, 39(10):20220834 doi: 10.13224/j.cnki.jasp.20220834
CHEN Yingtao, LIANG Shuwei, AI Yanting, et al. Influence of variable temperature circulating air on turbine guide vane life[J]. Journal of Aerospace Power, 2024, 39(10):20220834 doi: 10.13224/j.cnki.jasp.20220834
Citation: CHEN Yingtao, LIANG Shuwei, AI Yanting, et al. Influence of variable temperature circulating air on turbine guide vane life[J]. Journal of Aerospace Power, 2024, 39(10):20220834 doi: 10.13224/j.cnki.jasp.20220834

变温循环冷气对涡轮导叶寿命影响

doi: 10.13224/j.cnki.jasp.20220834
详细信息
    作者简介:

    陈英涛(1975-),男,副教授、硕士生导师,博士生,主要从事发动机整机振动测试分析与故障诊断等方面的研究

    通讯作者:

    梁书伟(1998-),男,硕士生,主要研究叶片热疲劳方向。E-mail:2241620854@qq.com

  • 中图分类号: V232.4

Influence of variable temperature circulating air on turbine guide vane life

  • 摘要:

    为提高燃气轮机涡轮导叶的可靠性及其使用寿命,引入变温循环冷气的概念,以某涡轮叶片为例,开展了燃气涡轮叶片热冲击循环疲劳寿命研究,对燃气轮机涡轮导叶进行启-停循环载荷谱下的应力状态的三维流固热耦合有限元分析,针对叶片在变温循环冷气的热冲击应力变化规律,得到叶片在循环中的稳态与过渡态下的温度场、应力场分布,之后对各个计算工况下的叶片结构强度与疲劳寿命进行分析与评估。搭建试验台,对该型燃气轮机涡轮导叶进行定温冷气循环下的热冲击疲劳试验,与有限元分析结果进行比对,得到结论:三维流固热耦合有限元分析所得叶片应力较大区域为叶片尾缘及叶盆中部,与热冲击试验所得破坏区一致,通过改变冷气循环温度可有效的提高叶片热疲劳寿命。

     

  • 图 1  涡轮导叶热流固耦合仿真计算流程图

    Figure 1.  Flow chart of turbine guide vane thermal fluid-structure coupling simulation calculation

    图 2  涡轮叶片模型

    Figure 2.  Turbine vane model

    图 3  涡轮导叶理论外流场

    Figure 3.  Theoretical external flow field of turbine guide vane

    图 4  涡轮导叶流场实体图

    Figure 4.  Solid diagram of turbine guide vane flow field

    图 5  流场入口温度变化折线图

    Figure 5.  Flow field inlet temperature change line chart

    图 6  定温冷气循环下叶片温度场分布

    Figure 6.  Distribution of vane temperature field under constant temperature cooling air cycle

    图 7  涡轮导叶等效应力分布云图

    Figure 7.  Equivalent stress distribution nephogram of turbine guide vane

    图 8  涡轮导叶危险节点分布

    Figure 8.  Distribution of turbine guide vane dangerous nodes

    图 9  涡轮导叶疲劳寿命云图

    Figure 9.  Fatigue life nephogram of turbine guide vane

    图 10  叶片应力随冷气峰值温度变化拟合图

    Figure 10.  Fitting diagram of vane stress variation with peak temperature of cold air

    图 11  循环次数随冷气温度变化拟合图

    Figure 11.  Fitting diagram of cycle times changing with cold air temperature

    图 12  热冲击试验台

    Figure 12.  Thermal shock test bench

    图 13  不同循环次数下叶片尾缘裂纹

    Figure 13.  Trailing edge cracks of vane under different cycles

    图 14  不同循环次数下叶片缘板裂纹

    Figure 14.  Vane edge plate cracks under different cycles

    表  1  涡轮导叶工况参数

    Table  1.   Turbine guide vane operating parameters

    工作
    介质
    燃气
    温度
    冷气
    温度
    燃气总压/
    MPa
    冷气总压/
    MPa
    工作条件 可调 可调 0.75 0.35
    下载: 导出CSV

    表  2  涡轮导叶各危险节点载荷应力

    Table  2.   Load stress at each dangerous node of the turbine guide vane

    节点编号 载荷应力/MPa
    外部节点 内部节点
    1 29.5 58.2
    2 27.6 52.1
    3 38.6 59.5
    4 220.4 231.2
    5 231.7 228.7
    6 91.53 88.5
    7 128.4 125.1
    8 157.2 166.8
    9 134.3 132.4
    10 103.8 129.4
    下载: 导出CSV
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  • 收稿日期:  2022-11-01
  • 网络出版日期:  2024-02-04

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