Analysis and experimental test of a 200 kW oil-free micro gas turbine simulator

Bonjin Koo; Chang Ho Kim; Jong Sung Lee; Tae Ho Kim; Kyuho Sim

doi:10.1007/978-3-319-06590-8_24

Analysis and experimental test of a 200 kW oil-free micro gas turbine simulator

Bonjin Koo, Chang Ho Kim, Jong Sung Lee, Tae Ho Kim, Kyuho Sim

Dept. of Mechanical System and Design Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

This paper presents the measured rotordynamic performance and model predictions of a 200 kW oil-free micro gas turbine simulator (MGTS). The MGTS has a single spool configuration, and a gas generator rotor (GTR) and an electric motor rotor (EMR) connected by a diaphragm coupling and supported on gas foil journal bearings (GFJBs). A couple of double acting gas foil thrust bearings (GFTB) are used inside the gas turbine. The MGTS is a full-size replica of a 200 kW micro gas turbine, with the exception of the impeller blades of the compressor and turbine. The design of the diaphragm coupling determines the first and second bending critical speeds of the MGTS. A speed-up test was conducted up to 40 krpm to evaluate the rotordynamic stability of the rotor-bearing system. The test results showed that the synchronous motion had several peaks, which were due to the rigid modes of the rotor-bearing system. The highest peak occurred at ~10 krpm and was produced by the second bending mode of the coupling. The results for 40 krpm revealed the occurrence of small amplitude synchronous motions. The predicted critical speeds of the rotor-bearing system and synchronous rotor motions were in good agreement with test data.

Original language	English
Title of host publication	Proceedings of the 9th IFToMM International Conference on Rotor Dynamics
Editors	Paolo Pennacchi
Publisher	Kluwer Academic Publishers
Pages	307-319
Number of pages	13
ISBN (Electronic)	9783319065892
DOIs	https://doi.org/10.1007/978-3-319-06590-8_24
State	Published - 2015
Event	9th IFToMM International Conference on Rotor Dynamics, 2014 - Milan, Italy Duration: 22 Sep 2014 → 25 Sep 2014

Publication series

Name	Mechanisms and Machine Science
Volume	21
ISSN (Print)	2211-0984
ISSN (Electronic)	2211-0992

Conference

Conference	9th IFToMM International Conference on Rotor Dynamics, 2014
Country/Territory	Italy
City	Milan
Period	22/09/14 → 25/09/14

Keywords

Flexible rotor
Gas foil bearings
Micro gas turbine
Rotordynamics

Access to Document

10.1007/978-3-319-06590-8_24

Cite this

Koo, B., Kim, C. H., Lee, J. S., Kim, T. H., & Sim, K. (2015). Analysis and experimental test of a 200 kW oil-free micro gas turbine simulator. In P. Pennacchi (Ed.), Proceedings of the 9th IFToMM International Conference on Rotor Dynamics (pp. 307-319). (Mechanisms and Machine Science; Vol. 21). Kluwer Academic Publishers. https://doi.org/10.1007/978-3-319-06590-8_24

@inproceedings{75e484187a23454880fafb7f1cc1517d,

title = "Analysis and experimental test of a 200 kW oil-free micro gas turbine simulator",

abstract = "This paper presents the measured rotordynamic performance and model predictions of a 200 kW oil-free micro gas turbine simulator (MGTS). The MGTS has a single spool configuration, and a gas generator rotor (GTR) and an electric motor rotor (EMR) connected by a diaphragm coupling and supported on gas foil journal bearings (GFJBs). A couple of double acting gas foil thrust bearings (GFTB) are used inside the gas turbine. The MGTS is a full-size replica of a 200 kW micro gas turbine, with the exception of the impeller blades of the compressor and turbine. The design of the diaphragm coupling determines the first and second bending critical speeds of the MGTS. A speed-up test was conducted up to 40 krpm to evaluate the rotordynamic stability of the rotor-bearing system. The test results showed that the synchronous motion had several peaks, which were due to the rigid modes of the rotor-bearing system. The highest peak occurred at \textasciitilde{}10 krpm and was produced by the second bending mode of the coupling. The results for 40 krpm revealed the occurrence of small amplitude synchronous motions. The predicted critical speeds of the rotor-bearing system and synchronous rotor motions were in good agreement with test data.",

keywords = "Flexible rotor, Gas foil bearings, Micro gas turbine, Rotordynamics",

author = "Bonjin Koo and Kim, \{Chang Ho\} and Lee, \{Jong Sung\} and Kim, \{Tae Ho\} and Kyuho Sim",

note = "Publisher Copyright: {\textcopyright} Springer International Publishing Switzerland 2015.; 9th IFToMM International Conference on Rotor Dynamics, 2014 ; Conference date: 22-09-2014 Through 25-09-2014",

year = "2015",

doi = "10.1007/978-3-319-06590-8\_24",

language = "English",

series = "Mechanisms and Machine Science",

publisher = "Kluwer Academic Publishers",

pages = "307--319",

editor = "Paolo Pennacchi",

booktitle = "Proceedings of the 9th IFToMM International Conference on Rotor Dynamics",

}

Koo, B, Kim, CH, Lee, JS, Kim, TH & Sim, K 2015, Analysis and experimental test of a 200 kW oil-free micro gas turbine simulator. in P Pennacchi (ed.), Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Mechanisms and Machine Science, vol. 21, Kluwer Academic Publishers, pp. 307-319, 9th IFToMM International Conference on Rotor Dynamics, 2014, Milan, Italy, 22/09/14. https://doi.org/10.1007/978-3-319-06590-8_24

Analysis and experimental test of a 200 kW oil-free micro gas turbine simulator. / Koo, Bonjin; Kim, Chang Ho; Lee, Jong Sung et al.
Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. ed. / Paolo Pennacchi. Kluwer Academic Publishers, 2015. p. 307-319 (Mechanisms and Machine Science; Vol. 21).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Analysis and experimental test of a 200 kW oil-free micro gas turbine simulator

AU - Koo, Bonjin

AU - Kim, Chang Ho

AU - Lee, Jong Sung

AU - Kim, Tae Ho

AU - Sim, Kyuho

N1 - Publisher Copyright: © Springer International Publishing Switzerland 2015.

PY - 2015

Y1 - 2015

N2 - This paper presents the measured rotordynamic performance and model predictions of a 200 kW oil-free micro gas turbine simulator (MGTS). The MGTS has a single spool configuration, and a gas generator rotor (GTR) and an electric motor rotor (EMR) connected by a diaphragm coupling and supported on gas foil journal bearings (GFJBs). A couple of double acting gas foil thrust bearings (GFTB) are used inside the gas turbine. The MGTS is a full-size replica of a 200 kW micro gas turbine, with the exception of the impeller blades of the compressor and turbine. The design of the diaphragm coupling determines the first and second bending critical speeds of the MGTS. A speed-up test was conducted up to 40 krpm to evaluate the rotordynamic stability of the rotor-bearing system. The test results showed that the synchronous motion had several peaks, which were due to the rigid modes of the rotor-bearing system. The highest peak occurred at ~10 krpm and was produced by the second bending mode of the coupling. The results for 40 krpm revealed the occurrence of small amplitude synchronous motions. The predicted critical speeds of the rotor-bearing system and synchronous rotor motions were in good agreement with test data.

AB - This paper presents the measured rotordynamic performance and model predictions of a 200 kW oil-free micro gas turbine simulator (MGTS). The MGTS has a single spool configuration, and a gas generator rotor (GTR) and an electric motor rotor (EMR) connected by a diaphragm coupling and supported on gas foil journal bearings (GFJBs). A couple of double acting gas foil thrust bearings (GFTB) are used inside the gas turbine. The MGTS is a full-size replica of a 200 kW micro gas turbine, with the exception of the impeller blades of the compressor and turbine. The design of the diaphragm coupling determines the first and second bending critical speeds of the MGTS. A speed-up test was conducted up to 40 krpm to evaluate the rotordynamic stability of the rotor-bearing system. The test results showed that the synchronous motion had several peaks, which were due to the rigid modes of the rotor-bearing system. The highest peak occurred at ~10 krpm and was produced by the second bending mode of the coupling. The results for 40 krpm revealed the occurrence of small amplitude synchronous motions. The predicted critical speeds of the rotor-bearing system and synchronous rotor motions were in good agreement with test data.

KW - Flexible rotor

KW - Gas foil bearings

KW - Micro gas turbine

KW - Rotordynamics

UR - https://www.scopus.com/pages/publications/84937390100

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DO - 10.1007/978-3-319-06590-8_24

M3 - Conference contribution

AN - SCOPUS:84937390100

T3 - Mechanisms and Machine Science

SP - 307

EP - 319

BT - Proceedings of the 9th IFToMM International Conference on Rotor Dynamics

A2 - Pennacchi, Paolo

PB - Kluwer Academic Publishers

T2 - 9th IFToMM International Conference on Rotor Dynamics, 2014

Y2 - 22 September 2014 through 25 September 2014

ER -

Analysis and experimental test of a 200 kW oil-free micro gas turbine simulator

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