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RISPrediction of Axial and Circumferential Flow Conditions in a High Temperature Foil Bearing With Axial Cooling Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A successful implementation of gas foil bearings (GFBs) into high temperature turbomachinery requires adequate thermal management to maintain system reliability and stability. The most common ...
Thermal Transfer Analysis of a Freezing Soil Medium with an Embedded Pipeline
Publisher: American Society of Civil Engineers
Abstract: This paper conducted the unsteady state heat transfer analyses, using the commercial code
Bump Type Foil Bearings and Flexure Pivot Tilting Pad Bearings for Oil Free Automotive Turbochargers: Highlights in Rotordynamic Performance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Oilfree turbochargers (TCs) require gas bearings in compact units of enhanced rotordynamic stability, mechanical efficiency, and improved reliability with reduced maintenance costs compared with oillubricated bearings. ...
Oil-Free Automotive Turbochargers: Drag Friction and On-Engine Performance Comparisons to Oil-Lubricated Commercial Turbochargers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Oil-free bearings for automotive turbochargers (TCs) offer unique advantages eliminating oil-related catastrophic TC failures (oil coking, severe bearing wear/seizure, and significant oil leakage, for example), while ...
Dynamic Response of a Rotor Supported on Hybrid Bearings in Air, Water, and Liquid Nitrogen: Measurements and Comparisons to Predictions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Modern liquid rocket engine turbopumps implement hybrid bearings, which combine hydrostatic and hydrodynamic fluid film principles, in compact and lightweight units known for their superior reusability, durability, and ...
On the Performance of Hybrid Thrust Bearings: Recess Design and Lubricant Influences
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. Hybrid thrust bearings are essential components in high-performance turbomachinery, particularly in applications experiencing significant static axial loads or dynamic axial load fluctuations. Their ability to ...
Adaptive Control of Active Balancing Systems for Speed-Varying Rotors Using Feedforward Gain Adaptation Technique
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a new adaptive control method for active balancing of speed-varying rotors. It is developed based on the feedforward gain adaptation problem, which is a classical technique ...
Hybrid Gas Bearings With Controlled Supply Pressure to Eliminate Rotor Vibrations While Crossing System Critical Speeds
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Microturbomachinery implements gas bearings in compact units of enhanced mechanical reliability. Gas bearings, however, have little damping and wear quickly during transient rub events. Flexure ...
Flexure Pivot Tilting Pad Hybrid Gas Bearings: Operation With Worn Clearances and Two Load-Pad Configurations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Gas film bearings enable the successful deployment of high-speed microturbomachinery. Foil bearings are in use; however, cost and lack of calibrated predictive tools prevent their widespread ...
Effect of Cooling Flow on the Operation of a Hot Rotor-Gas Foil Bearing System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Gas foil bearings (GFBs) operating at high temperature rely on thermal management procedures that supply needed cooling flow streams to keep the bearing and rotor from overheating. Poor thermal ...