摘要
将结构静强度可靠性、疲劳可靠性以及刚度可靠性作为基本约束条件,对某涡轮静、动叶片进行了三维气动设计优化。建立了涡轮叶片结构可靠性气动设计优化模型,给出了叶片热-流-固耦合分析流程及气动设计优化代价函数。结果表明:优化后,静、动叶片的气动效率均值分别提高了2.45%和6.17%,且气动效率的标准方差也有一定减小;优化后,动叶片的各项结构可靠度指标得到提高,且达到设计要求;动叶片的结构系统可靠度从91.3%提高到了99.87%。
Taking the strength reliability, fatigue reliability and stiffness reliability as the basic constraint conditions, the three dimension aerodynamic optimization was done for a turbine guide blade and rotating blade. First, an aerodynamic design optimization model of blade structural reliability was established. And the thermal-fluid-solid coupling analysis process and the aerodynamic design optimization cost function were gained. The results proved that: after optimization, the aerodynamic efficiency of the guide blade and rotating blade are promoted by 2.45% and 6.17% respectively, and the standard deviation of the aerodynamic efficiency is reduced to some extent at the same time; every structural reliability indexes are promoted to satisfy the design requirements; the structural system reliability of the rotating blade is increased from 91.3% to 99.87%.
出处
《热力透平》
2014年第4期235-238,275,共5页
Thermal Turbine
关键词
设计优化
气动效率
涡轮叶片
结构可靠性
design optimization
aerodynamic efficiency
turbine blade
structural reliability