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Application of 3D Navier-Stokes Equations and Mathematical Optimization Techniques to Improve the Efficiency of Seven-Stage Axial Compressor

The paper presents the results of an optimization of the high-pressure compressor of the engine NK-36ST using the mathematical optimization techniques. The article describes in detail the search algorithm of the optimal form of the compressor blades using the software package Numeca and software package IOSO. The description of the used numerical model is given, its verification was carried out. It is shown that only by correcting the stagger angles of the blade rows the efficiency of the considered compressor can be increased by 1.5% at the current position of the working point on the characteristic of the compressor. Also the search possibility of compromise solution that provides a simultaneous increase in the efficiency of the compressor in two modes is shown.