Increasing the efficiency of the axial low pressure compressor in three operation modes by optimizing the shape of its blades

• Published in: Journal of physics. Conference series 2017-01, Vol.803 (1), p.12121
• Main Authors: Popov, G M, Baturin, O V, Goriachkin, E S, Novikova, Yu D, Kolmakova, D A
• Format: Article
• Language: English
• Subjects: Engine inlets; Guide vanes; Low pressure; Mathematical models; Modernization; Multiple criterion; Numerical models; Optimization; Physics; Rotor blades; Software; Stalling; Workflow
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/803/1/012121

The paper proposes a method for multicriteria optimization of the low pressure compressor working process. The optimization was conducted in three engine modes, corresponding to the temperature of the air at engine inlet --15, +15, +45 °C. Parameters of the compressor were calculated in operational and stall points. The LPC modernization was performed with usage of optimization methods that implemented in the software package IOSO. To perform optimization, the LPC numerical model was created using the NUMECA FineTurbo software. Numerical models of the LPC workflow were created based on the design documentation. The coordinates of three points of a spline in a circumferential direction and a stagger angle were changed for the rotor blades. The coordinates of a mid-point and a point of the trailing edge, stagger angles, and also the position of sections in circumferential and axial directions were changed for the guide vanes. To prevent a shift of the LPC characteristics, we set restrictions for the LPC specific massflow, a minimal pressure raise and astall margin. As a result of this work, a variant of the compressor, ensuring the increase in its efficiency by 1.1% (abs.) and stall margins by 7.5% (abs.) in the primary operation mode has been found.