燃气轮机高温叶片内部冷却技术概述  

Recent Developments of Gas Turbine Internal Cooling Techniques

作　　者：阚瑞[1] 迟重然[1] 杨力[1] 任静[1] 蒋洪德[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《热力透平》2013年第4期260-264,287,共6页Thermal Turbine

摘　　要：综述了燃气轮机典型的内部冷却结构和设计手段。通过文献分析,提出内部冷却典型强化换热手段包括带肋通道冷却、扰流柱冷却和冲击冷却,重要设计手段包括一维管网和三维数值优化。管网计算基于实验总结的经验公式,计算效率高,关键在于动量方程的求解算法;三维数值优化可以降低设计对人工经验的依赖,关键在于合理选择优化目标和优化算法。分析表明,旋流等新的强化传热形式、微型冷却等新的叶片冷却模式、旋转和真实通道几何对内部冷却详细传热和流场的影响都将得到进一步研究,叶片设计技术将由人工经验性的设计逐渐向计算机自动化方向发展。The typical internal cooling structure and design method for gas turbine are reviewed and the three typical enhanced heat transfer methods for internal cooling , rib turbulator, pin fin and impingement are introduced. The one-dimensional flow network design using empirical correlations and the CFD optimization are commonly used for the design methods of internal cooling. The calculation algorithm for momentum equation is the key to achieve the high efficiency of Network design. Since CFD optimization could reduce the impact of experience on design process, thus the optimization goals and algorithms should be properly chosen. Future studies on internal cooling will focus on the new cooling geometries and methods, including swirl, ＂micro cooling＂ method and also focus on the impact of rotation on detailed heat transfer distribution and flow field. Auto-optimization using computer will be more and more used with the development of computer and turbulence modeling.

关 键 词：燃气轮机 内部冷却 扰流元件 一维管网 数值优化 

分 类 号：TK471[动力工程及工程热物理—动力机械及工程]