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SONG Liming
LI Jun
FENG Zhenping
Institute of Turbomachinery,
Xi’ an Jiaotong University,
Xi’ an 710049, China
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AERODYNAMIC OPTIMIZATION
DESIGN OF LOW ASPECT RATIO TRANSONIC TURBINE STAGE*
Abstract:
The advanced optimization method named as adaptive range differential evolution (ARDE) is developed. The optimization performance of ARDE is demonstrated using a typical mathematical test and compared with the standard genetic algorithm and differential evolution. Combined with parallel ARDE, surface modeling method and Navier-Stokes solution, a new automatic aerodynamic optimization method is presented. A low aspect ratio transonic turbine stage is optimized for the maximization of the isentropic efficiency with forty-one design variables in total. The coarse-grained parallel strategy is applied to accelerate the design process using 15 CPUs. The isentropic efficiency of the optimum design is 1.6% higher than that of the reference design. The aerodynamic performance of the optimal design is much better than that of the reference design.
Key words:
Turbine stage Adaptive range differential evolution (ARDE) Aerodynamic optimization Coarse-grained parallel strategy
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