Research on Effects of Geometry Parameters on Stability Zone of a Rotor Supported by Foil-Air Bearings Using an Improved Foil Model
Main Article Content
Abstract
Foil-air bearings have been drawing much scientists’ attention to application into high-speed rotating machines for environmentally friendly performance. Due to their compliant foil structure, foil-air bearings are able to resist being seized-up (because of high heat or centrifugal effect), thereby lengthening their service time. However, during working time, foil-air bearings are supposed to demonstrate their non-linear effects that need investigating, especially on rotor’s performance. In this paper, an improved foil dynamic model with bending moment included is proposed to determine the effective stiffness of foil structure. The results are compared to published experimental data. From that, influences of some geometry parameters on rotor’s stability are investigated based on a model of turbocharger with foil-air bearings.
Keywords
foil-air bearing, effective stiffness, non-linear dynamics
Article Details
References
[1] G. L. Agrawal (1997) Foil Air/Gas Bearing Technology – An Overview, Proceedings of the ASME Turbo Expo, Orlando, Florida, USA, No. 97-GT-347
[2] Daejong Kim (2007) Parametric Studies on Static and Dynamic Performance of Air Foil Bearings with Different Top Foil Geometries and Bump Stiffness Distributions, ASME Journal of Tribology, Vol. 129, April 2007
[3] P. Bonello, H.M. Pham, (2014), The efficient computation of the nonlinear dynamic response of a foil–air bearing rotor system,Journal of Sound and Vibration,Vol 333(15) / 3459–3478.
[4] Ku, C. P., Heshmat, H. (1992), Compliant Foil Bearings Structural Stiffness Analysis Part I: Theretical Model Including Strip and Variable Bump Foil Geometry, ASME Journal of Tribology, 114(2), pp. 394-400.
[5] Iordanoff, I., (1999), Analysis of an Aerodynamic Compliant Foil Thrust Bearing: Method for a Rapid Design”, ASME Journal of Tribology, 121, pp. 816-822
[6] S. Le Lez, M. Arghir, J. Frene (2007), A New Bump-Type Foil Bearing Structure Analytical Model, ASME Journal of Engineering for Gas Turbines and Power, Vol, 129, O ctober 2007
[7] Hai Pham, P. Bonello (2013) Efficient Techniques for thr Computation of the Nonlinear Dynamics of a Foil-Air Bearing Rotor System, Proceedings of ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, Texas, USA
[8] Pham Minh Hai, Nguyen Minh Quan, Nguyen Xuan Ha, Dang Bao Lam (2017), A parametric study on the effect of a discontinuous-foil air bearing on the dynamics of a turbomachine. Proceedings of the 11th SEATUC Symposium, Ho Chi Minh City, 2017.
[9] Minh-Hai Pham, Xuan-Ha Nguyen, Bao-Lam Dang (2015), On the computation of the vibration of foil-air bearing – rotor systems, Proceedings of the 16th Asia Pacific Vibration Conference.
[10] F. Xu, D. Kim, B. Z. Yazdi (2016), Theoretical Study of Top Foil Sagging Effect on the Performance of Air Thrust Foil Bearing, Proceedings of ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition.
[11] A. P. Chavan, Hong Zhou (2016), Analysis and Simulation of Slender Curved Beams, International Journal of Engineering Research & Technology, ISSN: 2278-0181, Vol. 5, pp. 214-221.
[2] Daejong Kim (2007) Parametric Studies on Static and Dynamic Performance of Air Foil Bearings with Different Top Foil Geometries and Bump Stiffness Distributions, ASME Journal of Tribology, Vol. 129, April 2007
[3] P. Bonello, H.M. Pham, (2014), The efficient computation of the nonlinear dynamic response of a foil–air bearing rotor system,Journal of Sound and Vibration,Vol 333(15) / 3459–3478.
[4] Ku, C. P., Heshmat, H. (1992), Compliant Foil Bearings Structural Stiffness Analysis Part I: Theretical Model Including Strip and Variable Bump Foil Geometry, ASME Journal of Tribology, 114(2), pp. 394-400.
[5] Iordanoff, I., (1999), Analysis of an Aerodynamic Compliant Foil Thrust Bearing: Method for a Rapid Design”, ASME Journal of Tribology, 121, pp. 816-822
[6] S. Le Lez, M. Arghir, J. Frene (2007), A New Bump-Type Foil Bearing Structure Analytical Model, ASME Journal of Engineering for Gas Turbines and Power, Vol, 129, O ctober 2007
[7] Hai Pham, P. Bonello (2013) Efficient Techniques for thr Computation of the Nonlinear Dynamics of a Foil-Air Bearing Rotor System, Proceedings of ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, Texas, USA
[8] Pham Minh Hai, Nguyen Minh Quan, Nguyen Xuan Ha, Dang Bao Lam (2017), A parametric study on the effect of a discontinuous-foil air bearing on the dynamics of a turbomachine. Proceedings of the 11th SEATUC Symposium, Ho Chi Minh City, 2017.
[9] Minh-Hai Pham, Xuan-Ha Nguyen, Bao-Lam Dang (2015), On the computation of the vibration of foil-air bearing – rotor systems, Proceedings of the 16th Asia Pacific Vibration Conference.
[10] F. Xu, D. Kim, B. Z. Yazdi (2016), Theoretical Study of Top Foil Sagging Effect on the Performance of Air Thrust Foil Bearing, Proceedings of ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition.
[11] A. P. Chavan, Hong Zhou (2016), Analysis and Simulation of Slender Curved Beams, International Journal of Engineering Research & Technology, ISSN: 2278-0181, Vol. 5, pp. 214-221.