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The goal of the objective function is to maximize the polytropic
efficiency of the turbine keeping the flow coefficient and the
polytropic head constant:
represents the required polytropic head.
The optimization of 9 out of 31 parameters (corresponding to a 2D
compressor) using CFSQP gives as result an increase of 3.5 % in
efficiency (from 85.3 % to 88.8 %) in about 100 functions
evaluations (4 days of computation). The CFSQP stopped prematurely
because of the noise on the objective function.
Frank Vanden Berghen