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

DING Chen1，2， XIN Xiao-peng1，2， SUI Yong-feng1，2，3， KONG Jian-qiang1，2， YE Zhong1，2，3
（1. Hangzhou Steam Turbine Co. Ltd.， Hangzhou 310022， China；
2. Zhejiang Industrial Steam Turbine Rotor Dynamics Research Key Laboratory， Hangzhou 310022， China
3. Postdoctor Working Station， Hangzhou Turbine & Power， Hangzhou 310022， China）

Abstract： 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.
Key words： air cooled condenser； blade mold design； computational fluid dynamics（CFD）； fluid analysis； off-design