Turbomachinery Blade Three-dimensional Aerodynamic Optimization Design

摘要

Turbomachinery is essential equipment in aircraft engine and power industries, and has been designed at higher performance by now. In order to farther improve its efficiency, an aerodynamic optimization design system has been developed for the blade 3D optimization design. The system includes parametric modeling, evaluation system and optimization strategy modules. The Non-Uniform Rational B-Spline (NURBS) technique is successfully used for parametric modeling of blade shape. The in-house viscous flow code and the commercial viscous flow code, NUMECA, were selected to achieve flow field evaluations. The optimization strategy is chosen from a commercial code iSIGHT. Parallel optimization technique was used to accelerate the optimization processes. Three test cases were optimized to improve the efficiency by using the optimization system. These cases are the annular turbine cascades with a subsonic turbine blade, a transonic turbine blade and a subsonic turbine stage. Reasonably high efficiency and performance were confirmed by comparing the analytic results with those of the previous designs. The present system can be an efficient and robust design tool to achieve good aerodynamic blade design optimization in a reasonable time.