Effect of operating speed on turbocharger compressor blade wear

ABSTRACT

In harsh environments, turbochargers require continuous adjustment of the rotating speed, which can lead to differences in erosive wear on the blades compared to erosive wear under constant speed conditions. In this study, the erosion model expression for an aluminum alloy plate with a fitted Ks value of 20 μm under the erosion of 160 μm SiO₂ particles is obtained through erosive wear experiments. Taking a turbocharger compressors as the research object, the influence of four commonly used working speeds on blade wear is analyzed. The results show that when the speed increases from 70,000 rpm to 130,000 rpm, the maximum wear rate concentration values for the main and splitter blades increase by approximately 590% and 310%.

Graphical abstracts

Highlights

• Finnie erosion model of real compressor blades was fitted through experiments.

• The working speed has a significant impact on the particle trajectory.

• As the speed increases, the wear area of the main blade gradually concentrates.

• As the speed increases, the wear area of the diverter vanes decreases abruptly.

Keywords:

• Turbocharger
• Compressor blades
• Erosive wear
• Surface roughness

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