Stability improvement of the ultra-high speed micro turbocharger supported by air foil bearings

Yong Suk Kwak; Chang Ho Kim; Jin Taek Chung; Yong Bok Lee

doi:10.3795/KSME-A.2008.32.7.541

Stability improvement of the ultra-high speed micro turbocharger supported by air foil bearings

Yong Suk Kwak, Chang Ho Kim, Jin Taek Chung, Yong Bok Lee

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

To improve the operational stability of the 100 Watts class Micro Gas Turbine, the air foil bearing with additional damping material has been investigated. The key of structure is that a viscoelastic material is coated under the top foil. The compliant foil journal bearing and thrust bearing are designed to withstand high load of vibrations at the operational speed 870,000 rpm. Test is executed in room temperature. Rotor has stably operated above 480,000 rpm. It is over 55% of the designed speed 870,000 rpm. Synchronous and subsynchronous vibrations are both well controlled. Vibration amplitude diminished over 50%. With the help of increased damping resulting from the viscoelasticity, the rotor stability of Micro turbocharger has been improved.

Original language	English
Pages (from-to)	541-548
Number of pages	8
Journal	Transactions of the Korean Society of Mechanical Engineers, A
Volume	32
Issue number	7
DOIs	https://doi.org/10.3795/KSME-A.2008.32.7.541
Publication status	Published - 2008 Jul

Keywords

Air foil bearing
Micro gas turbine engine
Rotor instability
Viscoelastic material

ASJC Scopus subject areas

Mechanical Engineering

Access to Document

10.3795/KSME-A.2008.32.7.541

Cite this

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title = "Stability improvement of the ultra-high speed micro turbocharger supported by air foil bearings",

abstract = "To improve the operational stability of the 100 Watts class Micro Gas Turbine, the air foil bearing with additional damping material has been investigated. The key of structure is that a viscoelastic material is coated under the top foil. The compliant foil journal bearing and thrust bearing are designed to withstand high load of vibrations at the operational speed 870,000 rpm. Test is executed in room temperature. Rotor has stably operated above 480,000 rpm. It is over 55% of the designed speed 870,000 rpm. Synchronous and subsynchronous vibrations are both well controlled. Vibration amplitude diminished over 50%. With the help of increased damping resulting from the viscoelasticity, the rotor stability of Micro turbocharger has been improved.",

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AU - Kim, Chang Ho

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AU - Lee, Yong Bok

PY - 2008/7

Y1 - 2008/7

N2 - To improve the operational stability of the 100 Watts class Micro Gas Turbine, the air foil bearing with additional damping material has been investigated. The key of structure is that a viscoelastic material is coated under the top foil. The compliant foil journal bearing and thrust bearing are designed to withstand high load of vibrations at the operational speed 870,000 rpm. Test is executed in room temperature. Rotor has stably operated above 480,000 rpm. It is over 55% of the designed speed 870,000 rpm. Synchronous and subsynchronous vibrations are both well controlled. Vibration amplitude diminished over 50%. With the help of increased damping resulting from the viscoelasticity, the rotor stability of Micro turbocharger has been improved.

AB - To improve the operational stability of the 100 Watts class Micro Gas Turbine, the air foil bearing with additional damping material has been investigated. The key of structure is that a viscoelastic material is coated under the top foil. The compliant foil journal bearing and thrust bearing are designed to withstand high load of vibrations at the operational speed 870,000 rpm. Test is executed in room temperature. Rotor has stably operated above 480,000 rpm. It is over 55% of the designed speed 870,000 rpm. Synchronous and subsynchronous vibrations are both well controlled. Vibration amplitude diminished over 50%. With the help of increased damping resulting from the viscoelasticity, the rotor stability of Micro turbocharger has been improved.

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KW - Micro gas turbine engine

KW - Rotor instability

KW - Viscoelastic material

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JO - Transactions of the Korean Society of Mechanical Engineers, A

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Stability improvement of the ultra-high speed micro turbocharger supported by air foil bearings

Abstract

Keywords

ASJC Scopus subject areas

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