Browsing Mechanical Engineering by Author "S. Gadala, Mohamed"
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Nonlinear Dynamics of Flexible Rotors Supported on Journal Bearings—Part I: Analytical Bearing Model
Miraskari, Mohammad; Hemmati, Farzad; S. Gadala, Mohamed (American Society of Mechanical Engineers, 2018)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
Miraskari, Mohammad; Hemmati, Farzad; S. Gadala, Mohamed (American Society of Mechanical Engineers, 2018)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 rotating stall in centrifugal compressor with vaned and vaneless diffuser
Halawa, Taher; Alqaradawi, Mohamed; S. Gadala, Mohamed (Springer Link, 2015-12)This study presents a numerical simulation of the stall and surge in a centrifugal compressor and presents a description of the stall development in two different cases. The first case is for a compressor with vaneless ...