Aerodynamic design and characteristics calculation of a turbine

LAN Jibing1,2, HE Dajiang1,2, CHU Peng1,2, SUI Yongfeng1,2,3, XIN Xiaopeng1,2, MAO Hanzhong1,2, KONG Jianqiang1,2

(1. Industrial Turbine Academy Turbomechanical Institute, Hangzhou Steam Turbine Co., Ltd., Hangzhou 310022, China;

2. Zhejiang Industrial Steam Turbine Rotor Dynamics Research Key Laboratory, Hangzhou 310022, China;

3. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: Aiming at the problem of gas turbine design, Turbine aerodynamic design system of Hangzhou steam turbine corporation was introduced. Moreover, computathonal method for mixing loss of cooled turbine and others method for defining the effieiency were elaborted. Through design concept of one dimensional thermal and S2 steam surface full radial equilibrium equation, a three stage turbine was acquired. CFD method was used to calculate the parameter in order to evaluate aerodynamic performance of the designed uncooled turbine, the aerodynamic performance of the designed cooled turbine was also evaluated through a source term method. Through threedimensional calculated, the characteristics curve such as peduced flow rate, reduced rotary speeds and efficiency of the designed turbine was got. The achievements of this paper also layed the good foundation for further aerodynamic optimization and strength vibration check.The result indicates: the designed turbine achieves 91% total efficiency without cooling and 89.7% total efficiency with cooling, it reaches the design target.

Key words: turbine; total efficiency; Aerodynamic design; characteristics curve