Turbomachinery blade optimization by a 3-dimentional inverse design method - 4th report, a hybrid design system based on inverse design and optimization algorithm

摘要

The effectiveness of a 3-dimentional inverse method for ideally determining blade configurations, by defining ideal flow fields and conducting numerical analysis for realizing such configurations, had been discussed in the previous three reports. This 4th report introduces a technique by which turbomachinery blade configurations are automatically optimized by a hybrid system constituting 3-dimensional inverse design, CFD (Computational Fluid Dynamics) analysis and optimization algorithm. An actual multi-objective optimization example is discussed, in which the initial value dependency of automatic optimization and the dependency of optiitdzation algorithm had been studied, afterwhich both the efficiency and suction performance of a mixed flow pump impeller had been optimized. Furthermore, an example indicating that this method is capable of improving the efficiency and pressure characteristics of a centrifugal compressor impeller over a wide flow range is introduced.