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RISA New Approach for the Stability Analysis of Rotors Supported by Gas Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A simplified nonlinear transient analysis method for gas bearings was recently published by the authors (Hassini, M. A., and Arghir, M., 2012, “Simplified Nonlinear Transient Analysis Method for Gas Bearings,†J. ...
Phase Change and Choked Flow Effects on Rotordynamic Coefficients of Cryogenic Annular Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present work deals with the numerical analysis of phase change effects and choked flow on the rotordynamic coefficients of cryogenic annular seals. The analysis is based on the “bulk flow†equations, with the energy ...
A Simplified and Consistent Nonlinear Transient Analysis Method for Gas Bearing: Extension to Flexible Rotors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A simplified, new method for evaluating the nonlinear fluid forces in air bearings was recently proposed (Hassini, M. A., and Arghir, M., 2012, “Simplified Nonlinear Transient Analysis Method for Gas Bearings,†ASME ...
Comparison Between Numerical and Experimental Dynamic Coefficients of a Hybrid Aerostatic Bearing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Hybrid journal bearings have been considered for many years as a possible replacement for ball bearings in turbopumps used by the aerospace industry. Due to flow regimes dominated by inertia ...
Rainwater Collection and Management from Roofs at the Edison Environmental Center
Publisher: American Society of Civil Engineers
Abstract: In the past, the U.S. Environmental Protection Agency Edison Environmental Center, a 80.9-ha (200-acre) federal-run facility, directed all rainwater from roofed areas to the existing storm water conveyance system. Over the ...
Theoretical and Experimental Comparisons for Rotordynamic Coefficients of a Multiscratched Tilting Pad Journal Bearing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a thermo-elasto-hydrodynamics model (TEHD) based on a mass conservative generalized Reynolds equation, coupled with three-dimensional (3D) energy equation for the oil film, and a full 3D thermo-mechanical ...
The Effect of Air–Water Mixture on the Dynamic Response of a Hydrodynamic Journal Bearing With Inclined Grooves
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Water-lubricated hydrodynamic journal bearings with deep inclined grooves are often used to support radial loads and dampen pump vibrations in nuclear power plants. The inclined grooves increase the pumping effect of the ...
Bond Performance of Basalt Fiber-Reinforced Polymer Bars to Concrete
Publisher: American Society of Civil Engineers
Abstract: This paper presents the test results of a study on the bond behavior of basalt fiber-reinforced polymer (BFRP) bars to concrete. Thirty six concrete cylinders reinforced with BFRP bars and twelve cylinders reinforced with ...
Experimental and Theoretical Rotordynamic Coefficients of Smooth and Round-Hole Pattern Water-Fed Annular Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This work presents the comparison between experimental and theoretical results obtained for three straight annular seals. One of the annular seals has smooth rotor and stator while the others have a textured stator; the ...
Vertical Axis Wind Turbine Aerodynamics: Summary and Review of Momentum Models
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Momentum models or streamtube models represent one of the fundamental approaches in modeling the aerodynamics of straight bladed vertical axis wind turbine (SB-VAWT) of Darrieus type. They are based on momentum (actuator ...