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RISImproving Tilting Pad Journal Bearing Predictions—Part II: Comparison of Measured and Predicted Rotor Pad Transfer Functions for a Rocker Pivot Tilting Pad Journal Bearing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: As described in Part I (Wilkes et al., 2012, “Improving TiltingPad Journal Bearing Predictions—Part I: Model Development and Impact of Rotor Excited Versus Bearing Excited Impedance Coefficients,†ASME J. Eng. Gas ...
Improving Tilting Pad Journal Bearing Predictions—Part I: Model Development and Impact of Rotor Excited Versus Bearing Excited Impedance Coefficients
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The floatingbearingtestrig concept was initially developed by Glienicke in 1966 and has since been used to test many tiltingpad journal bearings (TPJBs). The impedances measured during these tests have been compared to ...
An Improved Catcher Bearing Model and an Explanation of the Forward Whirl/Whip Phenomenon Observed in Active Magnetic Bearing Transient Drop Experiments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Though many approaches have been proposed in the literature to model the reaction forces in a catcher bearing (CB), there are still phenomena observed in experimental tests that cannot be explained by existing models. The ...
Impact of Bearing Clearance on Measured Stiffness and Damping Coefficients and Thermal Performance of a High-Stiffness Generation 3 Foil Journal Bearing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: High-speed foil bearings are currently used in increasingly demanding, high performance applications. The application under consideration is a 120 krpm natural gas turboexpander-compressor, which requires 38 mm (1.5 in.) ...
Experimental Validation of a Wide-Range Centrifugal Compressor Stage for Supercritical CO2 Power Cycles
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Successful implementation of sCO2 power cycles requires high compressor efficiency at both the design-point and over a wide operating range in order to maximize cycle power output and maintain stable operation over a wide ...
The Comparison of Aerodynamic Performance Data Acquired From Thermal Measurements and a Torquemeter on a Compressor Impeller
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Full-thermal heat-soak of machinery is vital for acquiring accurate aerodynamic performance data, but this process often requires significant testing time to allow all facility components to reach a steady-state temperature. ...
Numerical Predictions of Mean Performance and Dynamic Behavior of a 10 MWe SCO2 Compressor With Test Data Validation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Highfidelity aerodynamic analysis has been demonstrated for mean performance and unsteady dynamics in a sCO2 compressor designed by Hanwha Power Systems Americas for a 10 MWe Concentrating Solar Power plant. Simulations ...
Experimentally Measured Effectiveness of Different Shroud Swirl Brake Profiles in a Centrifugal Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: As centrifugal compressors are pushed to operate at higher pressures and higher power levels, destabilizing gas forces often increase the challenge of designing a stable rotordynamic system. While technical innovations ...
The Influence of Ambient Pressure on the Measured Load Capacity of Bump-Foil and Spiral-Groove Gas Thrust Bearings at Ambient Pressures up to 69 Bar on a Novel High-Pressure Gas Bearing Test Rig
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper will show the influence of ambient pressure on the thrust capacity of bump-foil and spiral-groove gas thrust bearings. The bearings were operating in nitrogen at various pressures up to 69 bar and were tested ...