Browsing by Author "Hemmati, Farzad"
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Linear stability analysis of finite length journal bearings in laminar and turbulent regimes
Miraskari, Mohammad; Hemmati, Farzad; Alqaradawi, M. Y.; Gadala, Mohamed S. ( SAGE Publications Ltd , 2017 , Article)Dynamic coefficients of a finite length journal bearing are numerically calculated under laminar and turbulent regimes based on Ng-Pan-Elrod and Constantinescu models. Linear stability charts of a flexible rotor supported ... -
Optimized statistical parameters of acoustic emission signals for monitoring of rolling element bearings
Hemmati, Farzad; Alqaradawi, Mohammed; Gadala, Mohamed S ( SAGE Publications Ltd , 2016 , Article)Acoustic emission (AE) signal generated from artificial defects in rolling element bearings are investigated using experimental measurements in this paper. Rolling element bearings are crucial parts of many machines and ... -
A Robust Modification to the Universal Cavitation Algorithm in Journal Bearings
Miraskari, Mohammad; Hemmati, Farzad; Jalali, Alireza; Alqaradawi, M. Y.; Gadala, Mohamed S. ( American Society of Mechanical Engineers , 2016 , Article)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 ... -
Rolling element bearing fault diagnostics using acoustic emission technique and advanced signal processing
Hemmati, Farzad; Alqaradawi, Mohammed; Gadala, Mohamed S. ( SAGE Publications Ltd , 2016 , Article)Acoustic emission (AE) signal generated from defects in rolling element bearings are investigated using simulated defects and experimental measurements in this paper. Rolling element bearings are crucial parts of many ...