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RISEffect of Side Feed Pressurization on the Dynamic Performance of Gas Foil Bearings: A Model Anchored to Test Data
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Comprehensive modeling of gas foil bearings (GFBs) anchored to reliable test data will enable the widespread usage of these bearings into novel high speed turbomachinery applications. GFBs often ...
Thermohydrodynamic Model Predictions and Performance Measurements of Bump-Type Foil Bearing for Oil-Free Turboshaft Engines in Rotorcraft Propulsion Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An engineered thermal management is fundamental to the application of gas foil bearings (GFBs) as turboshaft supports in rotorcraft propulsion systems. The paper presents a model for the thermal ...
Limits for High-Speed Operation of Gas Foil Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Commercial oil-free microturbomachinery implements gas foil bearings (GFBs) for reliable performance with improved efficiency. However, GFB modeling is still largely empirical, lacking experimental ...
Thermohydrodynamic Analysis of Bump Type Gas Foil Bearings: A Model Anchored to Test Data
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The paper introduces a thermohydrodynamic (THD) model for prediction of gas foil bearing (GFB) performance. The model includes thermal energy transport in the gas film region and with cooling ...
Heavily Loaded Gas Foil Bearings: A Model Anchored to Test Data
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Widespread usage of gas foil bearings (FBs) into microturbomachinery to midsize gas turbine engines requires accurate performance predictions anchored to reliable test data. This paper presents a ...
Characterization of a Foil Bearing Structure at Increasing Temperatures: Static Load and Dynamic Force Performance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Oil-free turbomachinery relies on gas bearing supports for reduced power losses and enhanced rotordynamic stability. Gas foil bearings (GFBs) with bump-strip compliant layers can sustain large ...
Rolling Stream Trails: An Alternative Cavitation Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The rolling stream trail (RST) model introduces a new formulation of cavitation analysis of an eccentric journal bearing; it is presented as a preferred foundation for cavitation analysis of a ...
Rotordynamic Performance of Shimmed Gas Foil Bearings for Oil-Free Turbochargers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Oil-free turbochargers (TCs) will increase the power and efficiency of internal combustion engines, both sparking ignition and compression ignition, without engine oil lubricant feeding or scheduled ...
Measurement of Structural Stiffness and Damping Coefficients in a Metal Mesh Foil Bearing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Engineered metal mesh foil bearings (MMFBs) are a promising low cost bearing technology for oil-free microturbomachinery. In a MMFB, a ring shaped metal mesh provides a soft elastic support to ...
Rotordynamic Performance of a Rotor Supported on Bump Type Foil Gas Bearings: Experiments and Predictions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Gas foil bearings (GFBs) satisfy the requirements for oil-free turbomachinery, i.e., simple construction and ensuring low drag friction and reliable high speed operation. However, GFBs have a ...