董美静,梁文萍,缪强,等. 气膜孔几何结构对涡轮叶片力学性能影响的研究进展[J]. 失效分析与预防,2025,20(2):160-168. doi: 10.3969/j.issn.1673-6214.2025.02.012
    引用本文: 董美静,梁文萍,缪强,等. 气膜孔几何结构对涡轮叶片力学性能影响的研究进展[J]. 失效分析与预防,2025,20(2):160-168. doi: 10.3969/j.issn.1673-6214.2025.02.012
    DONG Meijing,LIANG Wenping,MIAO Qiang,et al. Research progress on effects of gas film pore geometry on mechanical properties of turbine blades[J]. Failure analysis and prevention,2025,20(2):160-168. doi: 10.3969/j.issn.1673-6214.2025.02.012
    Citation: DONG Meijing,LIANG Wenping,MIAO Qiang,et al. Research progress on effects of gas film pore geometry on mechanical properties of turbine blades[J]. Failure analysis and prevention,2025,20(2):160-168. doi: 10.3969/j.issn.1673-6214.2025.02.012

    气膜孔几何结构对涡轮叶片力学性能影响的研究进展

    Research Progress on Effects of Gas Film Pore Geometry on Mechanical Properties of Turbine Blades

    • 摘要: 气膜孔因其卓越的冷却效果被广泛用于涡轮叶片,但气膜孔会导致材料产生缺陷且造成应力集中等不利影响,从而降低叶片的力学性能。同时,气膜的冷却效果受气膜孔几何结构(孔型和布局)的影响,不同几何结构的气膜孔其力学性能也会发生改变。合理设计气膜孔的几何结构,提升冷却效果,同时减小其对力学性能的不利影响,是亟需解决的问题。本文从宏观和微观角度阐述了气膜孔对涡轮叶片蠕变和疲劳的影响及其机理,重点分析了气膜孔几何结构变化与材料蠕变寿命、疲劳寿命之间的关系,总结了气膜孔布局和孔型对力学性能影响,并对气膜孔的未来研究方向和工程应用提出建议。

       

      Abstract: Air film holes are widely used in turbine blades due to their excellent cooling effect. The introduction of film holes will lead to defects, stress concentration and other adverse effects, destroying the mechanical properties of the blades. The film cooling effect is affected by the geometric structure (hole type and layout) of the film holes. The different film hole geometric structures will also change the effect on mechanical properties. It is an urgent problem to reasonably design the geometric structure of film holes to improve the cooling effect while reducing the adverse effects on mechanical properties. This paper first explains the influence and mechanism of the existence of film holes on the creep and fatigue properties of turbine blades from a macroscopic and microscopic perspective, and then focuses on analyzing the specific changes in the creep life and fatigue life of the specimens with the change of the geometric structure of the film holes. The research progress on the influence of the layout and hole type of film holes on mechanical properties is summarized. Finally, the suggestions for the future research direction and engineering application of film holes are proposed.

       

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