空冷汽轮机低压级组叶片模化设计与开发

针对空冷汽轮机低压级组叶片设计困难的问题,基于叶片模化设计技术,结合先进的计算流体动力学(CFD)技术,提出了空冷汽轮机低压级组叶片模化和改型优化设计方法.该方法主要是用于将母型低压级组叶片通过模化设计改进为与设计目标总体性能参数相近的低压级组,在此基础上,应用三维气动分析设计优化方法对低压级组进行了改型优化设计,得到了满足设计要求的空冷低压级组叶片；同时,对低压级组进行变工况分析,以保证低压级组在许用范围内具有较好的变工况性能.该方法将多种先进技术相结合,缩短了开发周期,降低了开发成本.研究结果表明,采用该方法开发的低压级组能够很好地继承母型低压级组的优良特性,保证了叶片的安全性和可靠性,具有良好的气动性能和适用范围.

Mold design and development of low pressure blade stages for steam turbine with air cooled condenser

Aiming at the design of low pressure blade stages for steam turbine with air cooled condenser is difficult, based on the technology of simulation design, and combined with advanced computational fluid dynamics （CFD） technique, simulation design and improvement method were established. By simulation design, the original blade stages were simulated in the blade stages which can satisfy with total parameters of the design requirement. Then, full three-dimension analysis method was applied to the improvement of the blade stages which can make the blade stages of low pressure fulfill the requirement of design. Many advanced techniques were applied in simulation and improvement method which shortens the period of the improvement and decreases the cost of the improvement. The results indicate that improved stages inherit the advantageous character of the original blade stages, have good safety and reliability, aerodynamic performance and extensive range for the application.