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Nonlinear Dynamics of Flexible Rotors Supported on Journal Bearings—Part I: Analytical Bearing Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To determine the bifurcation types in a rotor-bearing system, it is required to find higher order derivatives of the bearing forces with respect to journal velocity and position. As closed-form expressions for journal ...
Nonlinear Dynamics of Flexible Rotors Supported on Journal Bearings—Part II: Numerical Bearing Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The nonlinear stability of a flexible rotor-bearing system supported on finite length journal bearings is addressed. A perturbation method of the Reynolds lubrication equation is presented to calculate the bearing nonlinear ...
Numerical Investigation of Turbulence Production Under Two-Phase Flow in a Simulation of Electrical Submersible Pump Performance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Investigating the characteristics of gas–liquid two-phase flow in a centrifugal pump is critical for evaluating pump performance. In this study, a numerical simulation was performed to understand the effects of gas–liquid ...
Influence of Changing Casing Groove Parameters on the Performance of Centrifugal Compressors Near Stall Condition
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The casing treatment is an effective method for increasing the stall margin of compressors and enhancing the flow distribution at the blades tip. The present numerical study focuses on making an optimization of the casing ...
Optimization of the Efficiency of Stall Control Using Air Injection for Centrifugal Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Numerical investigation of the optimization of the stall control efficiency for a high speed centrifugal compressor using air injection is presented. External air was injected close to the diffuser entrance at the shroud ...
A Robust Modification to the Universal Cavitation Algorithm in Journal Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the current study, a modified fast converging, mass-conserving, and robust algorithm is proposed for calculation of the pressure distribution of a cavitated axially grooved journal bearing based on the finite volume ...