Microturbocharger with air foil bearings for a 100-W class micro power system and improvement of rotordynamic performance

Yong Bok Lee, Yong Suk Kwak, Jin Taek Chung, Kyuho Sim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

This article presents the experimental investigation of a microturbocharger supported on bump-type air foil bearings (AFBs) for a 100-W power generation. The microturbocharger was designed via thermodynamic cycle analyses as well as rotordynamic analyses and constructed using a centrifugal compressor and turbine with tip diameter of 10 mm. The tests for AFBs at rotating speeds up to 410 krpm driven by air showed a large subsynchronous motion at 100 Hz. However, AFBs with an additional viscoelastic film eliminated the subsynchronous response due to increased damping by the viscoelastic film. The compressor performance was evaluated numerically and experimentally.

Original languageEnglish
Pages (from-to)939-948
Number of pages10
JournalTribology Transactions
Volume54
Issue number6
DOIs
Publication statusPublished - 2011

Keywords

  • Air Foil Bearing
  • Micro Power System
  • Rotordynamics
  • Viscoelastic Foil Bearing

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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