Numerical Investigation and Non-Axisymmetric Endwall Profiling of a Turbine Stage

作     者：REHMAN Abdul LIU Bo 

作者机构：School of Power and EnergyNorthwestern Polytechnical UniversityXi'an 710072China Shaanxi Key Laboratory of Internal Aerodynamics in Aero-EngineXi’an 710072China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2019年第28卷第4期

页      面：811-825页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：optimization non-axisymmetric endwall high pressure turbine stage efficiency secondary kinetic energy steady unsteady off-design 

摘      要：This paper presents an optimization of a high pressure turbine by constructing non-axisymmetric endwalls to the stator row and the rotor *** optimization was quantified by using optimization algorithms based on the multi-objective *** objective was to increase total-to-total efficiency with the constraint on the mass flow rate equal to the design point *** order to ensure that global optimum could be achieved,the function of parameters was first approximated through the artificial neural network,and then optimum was achieved by implementing the genetic *** was adopted through the design and optimization environment of FineTM/Design3 *** individual treatments of the endwalls were ***,the hub and the shroud of the stator were optimized ***,the hub of the rotor was ***,the rotor hub was optimized in the presence of the optimized *** result of the investigation showed that the optimized shape of the endwalls can significantly help to increase the efficiency up to 0.18%with the help of a reduction of the transverse pressure *** coefficient of secondary kinetic energy,entropy coefficient,spanwise mass averaged entropy were *** order to investigate the periodic effects,the design of the optimized turbine under steady simulations was confirmed through unsteady *** last part of the investigation made sure that the performance improvement remained consistent over the full operating line at off-design conditions by the implementation of non-axisymmetric endwalls.