Performance Of A Foil-Magnetic Hybrid Bearing Swanson, E.E., Heshmat, H., Walton, J.F. II, 2002 ASME Journal of Engineering for Gas Turbine and Power, 124, 2002, pp. 375-382. Abstract To meet the advanced bearing needs of modern turbomachinery, a hybrid foil-magnetic hybrid bearing system was designed, fabricated and tested in a test rig designed to simulate…

Oil-Free Foil Bearings As A Reliable, High Performance Backup Bearing For Active Magnetic Bearings Swanson, E.E., Heshmat, H., 2002 ASME Paper GT-2002-30291. Abstract Gas turbine engines and other high speed rotating machinery supported by magnetic bearings require some form of backup bearing to ensure reliable and safe operation. To date, this backup capability has been…

Generalized Entities: A Modern Framework For Rotor Dynamics Software Swanson, E.E., and Pulitzer, S.W. III, 2002 Presented at the 2002 IFToMM Sixth International Conference on Rotor Dynamics. Abstract Traditionally, the organization of the data for rotor dynamics software has been centered about the needs of the analysis routines. This paper offers a new approach based…

Demonstration Of Powder Shear Damping Applied To Plates Pulitzer, S.W., Swanson, E.E., and Heshmat, H., 2002 Boundary and Mixed Lubrication: Science and Applications D. Dowson, et. al. (eds), Elsevier Science B.V. pp. 547-553. Abstract Thin powder films have been proposed as a damping medium to overcome the thermal and frequency limitations of viscoelastic materials. In…

A Test Stand For Dynamic Characterization Of Oil-Free Bearings For Modern Gas Turbine Engines Swanson, E.E., Walton, J.F., II, Heshmat, H., 2002 ASME Paper GT-2002-30005. Abstract A multi-purpose rotor-bearing dynamic simulator was designed and fabricated for the purpose of experimentally evaluating and validating performance of advanced oil-free and back-up bearings under realistic dynamic conditions.  The…

Thermal Features Of Compliant Foil Bearings – Theory And Experiments Salehi, M., Swanson, E., and Heshmat, H., 2001 ASME Journal of Tribology, 123, pp. 566-571. Abstract The paper presents an analytical and experimental investigation aimed at eliciting the thermal characteristics of air lubricated compliant foil bearings. A Couette approximation to the energy equation is used…

On The Application Of Powder Shear Damping To A Structural Element Swanson, E.E., Xu, D.S., Russell, T.E., Walton, J.F. II, Heshmat, H., 2000 ASME Paper 2000-GT-0365. Abstract With the increasing demands placed on modern gas turbine components, improvements in high temperature compatible damping technology are required. The areas of application include turbine airfoils, struts, guide…

Capabilities Of Large Foil Bearings Swanson, E.E., Heshmat, H., 2000 ASME Paper 2000-GT-387. Abstract An experimental program was conducted on a large compliant surface foil bearing to document its performance.  This large single pad foil bearing is 100 mm in diameter, and was operated at speeds of up to 30,000 RPM.   Operation at 22,000 RPM…

A Gas Turbine Engine Backup Bearing Operating Beyond 2.5 Million DN Swanson, E.E., Walton, J.F. II, Heshmat, H., 2000 ASME Paper 2000-GT-622. Abstract Gas turbine engines and high speed rotating machinery using magnetic bearings require auxiliary and backup bearings for reliability and safety of operation. A 140 mm diameter Zero Clearance Auxiliary Bearing (ZCAB) capable…

The Integration Of Structural And Fluid-Film Dynamic Elements In Foil Bearings Part II: A New Approach To The Problem Swanson, E.E., Heshmat, H., 1999 Proc. 1999 ASME Design Engineering Technical Conference, Paper DETC/VIB-8270 Abstract In Part I of this investigation a survey was made to see how the two-tiered construction of foil bearings, consisting as…