Development of the compressor impeller configuration algorithm

Abstract

The article addresses the improvement of compressor impeller configuration methods. One of the key parameters of compressor blade assembly quality is the uniform tension in the blade shroud joint. The authors have developed an algorithm for arranging the blades in the compressor impeller, which allows reducing the tension and ensures its uniform distribution. The algorithm kernel is based on a mathematical model developed for calculating shroud tension areas on the suction side and pressure side based on controlled deviations of the airfoil and shroud. The computed areas are used to sort the blades by the increasing tension area on the suction side and the decreasing one on the pressure side. At the final stage, the blades are arranged by their successive choice from among two rows and each next blade from the rows is installed in the casing, next to the pre-installed blades, with the change in the bypass direction. The algorithm is written in Python; 1,000 computing experiments were made to simulate the deviation of the parameters for 84 blades in the set. The algorithm function was compared to the arbitrary arrangement of the blades. As a result, the root-mean-square deviation of the originating tensions decreased from 0.54 mm2 to 132 mm2.