Turbochargers (TCs) aid to produce smaller and more fuel-efficient passenger vehicle engines with power outputs comparable to those of large displacement engines. This paper presents further progress on the nonlinear dynamic behavior modeling of rotor-radial bearing system (RBS) by including engine-induced (TC casing) excitations. The application concerns to a semi-floating bearing design commonly used in high speed turbochargers. Predictions from the model are validated against test data collected in an engine-mounted TC unit operating to a top speed of 160 krpm (engine speed = 3600 rpm). The bearing model includes non-cylindrical lubricant films as in a semi-floating ring bearing with an anti-rotation button. The nonlinear rotor transient response model presently includes input base motions for the measured TC casing accelerations for increasing engine load conditions. Engines induce TC casing accelerations rich in multiple harmonic frequencies; amplitudes being significant at 2 and 4 times the main engine speed. FFT post-processing of predicted nonlinear TC shaft motions reveals a subsynchronous whirl frequency content in good agreement with test data, in particular for operation at the highest engine speeds. Predicted total shaft motion is also in good agreement with test data for all engine loads and over the operating TC shaft speed range. The comparisons validate the rotor-bearing model and will aid in reducing product development time and expenditures.
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ASME Turbo Expo 2009: Power for Land, Sea, and Air
June 8–12, 2009
Orlando, Florida, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4887-6
PROCEEDINGS PAPER
Turbocharger Nonlinear Response With Engine-Induced Excitations: Predictions and Test Data
Luis San Andre´s,
Luis San Andre´s
Texas A&M University, College Station, TX
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Ash Maruyama,
Ash Maruyama
Texas A&M University, College Station, TX
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Kostandin Gjika,
Kostandin Gjika
Honeywell Turbo Technologies, Thaon-les-Vosges, France
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Sherry Xia
Sherry Xia
Honeywell Turbo Technologies, Shanghai, China
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Luis San Andre´s
Texas A&M University, College Station, TX
Ash Maruyama
Texas A&M University, College Station, TX
Kostandin Gjika
Honeywell Turbo Technologies, Thaon-les-Vosges, France
Sherry Xia
Honeywell Turbo Technologies, Shanghai, China
Paper No:
GT2009-59108, pp. 637-647; 11 pages
Published Online:
February 16, 2010
Citation
San Andre´s, L, Maruyama, A, Gjika, K, & Xia, S. "Turbocharger Nonlinear Response With Engine-Induced Excitations: Predictions and Test Data." Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea, and Air. Volume 6: Structures and Dynamics, Parts A and B. Orlando, Florida, USA. June 8–12, 2009. pp. 637-647. ASME. https://doi.org/10.1115/GT2009-59108
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