目前先进燃气轮机的燃气温度达到1500℃以上，远超涡轮叶片材料所承受温度极限，需要通过涡轮叶片冷却技术来保证燃气轮机运行及使用寿命，高效冷却已成为制约燃气轮机性能的关键技术。交错肋冷却结构具有强化换热能力强，表面换热系数分布均匀，叶片强度高等优点，已成为船用燃气轮机中常用的涡轮叶片内部冷却形式。本课题以船用燃气轮机涡轮叶片交错肋内部冷却结构为研究对象，基于内部流动换热机理实验台，结合瞬态液晶测温技术、三维PDA流场细节测试技术以及CFD仿真分析技术，研究不同雷诺数条件下，交错肋结构内流体冲击、流体横向漩涡与换热能力的交互作用，揭示其强化换热机理。同时，基于量纲分析理论，选取交错肋冷却结构的典型特征因素，利用正交试验设计方法设计计算方案，结合高阶响应曲面方法，建立交错肋流动换热特性与几何因素变化的定量关系式。为发展具有我国自主知识产权的先进舰用燃气轮机涡轮叶片内冷技术奠定理论基础。

Currently, advanced gas turbines operate at high temperature of 1500 ℃ or higher, which has far exceeded the limit temperature of turbine blade materials. In order to ensure the operation and service life of gas turbine, turbine blades should be cooled effectively, and cooling technology has been one of key technologies of gas turbines. With the advantages of good heat transfer enhancement capability, uniform surface heat transfer coefficient and good blade strength, matrix cooling channels are commonly used as internal cooling structure in marine gas turbines. Flow field and heat transfer characteristics inside matrix cooling channels will be studied in this project. Based on internal flow and heat transfer mechanism experimental apparatus, heat transfer distribution on primary surface will be measured using transient liquid crystal method. And flow field inside matrix cooling channels is obtained by three-dimentional Particle Dynamic Analyzer(PDA). With Computational Fluid Dynamics (CFD) simulation analysis method, interaction of complex flow field fluid (such as impingement and transverse vortexes) and heat transfer capability inside matrix cooling channels will be studied under different Reynolds numbers. And enhanced heat transfer mechanism of internal flow inside matrix cooling channels is revealed. Meanwhile，based on dimensional analysis theory, typical factors will be selected to characterize matrix cooling geometry. Orthogonal experimental design method will be employed to build computing schemes. With the help of higher-order response surface design methods, quantitative relationship between flow heat transfer characteristics and geometry factors of matrix cooling channels will be established. The ultimate goal of the research is to establish a theory foundation for the development of China's modern marine turbines' internal cooling technology with our own independent intellectual property.