Study of compressor blade wear pattern under transient acceleration

Abstract

In this study, the erosive wear model of blade surface under transient acceleration is derived based on Finnie's wear theory. The parameters for the blade surface wear model under SiO2 particle erosion are derived from experimental studies on erosive wear of aluminum alloy. The wear finite element model of a single runner of compressor blade is established, and the change rule of blade surface wear characteristics is studied under transient accelerated operating conditions. The study demonstrates that increasing the speed from 70,000 to 100,000 rpm causes the severe wear region on the pressure surface of the main blade to extend from 90% span to 55% span toward the center. The region of severe wear at the leading edge of the splitter blade pressure extends from 90% span to 70% span. The findings offer theoretical guidance for designing compressor blades to resist wear and for diagnosing rotor unbalanced vibrations.