Modeling of Piston Secondary Dynamics and Tribology

Keribar, Rıfat
Dursunkaya, Zafer


Modeling of piston secondary dynamics and tribology
Keribar, Rifat; Dursunkaya, Zafer (1992-06-01)
This paper describes a general, design-oriented model for the analysis of secondary motions in conventional and articulated piston assemblies. The model solves for the axial, lateral and rotational departures in positions and motions from the nominal kinematics, resulting from clearances within the piston assembly and also between the piston assembly components and the cylinder. In order to accurately represent the effect of oil films, the model includes comprehensive treatments of hydrodynamic and boundary...
Modeling of Multi Open Phase Fault Condition of Multi-phase Permanent Magnet Synchronous Motors
Fei, Marco; Zanasi, Roberto (2011-09-10)
This paper deals with the modeling of multi-phase permanent magnet synchronous motors under multi open phase fault condition. The presented model is suitable for generic number of phases, generic shape of the rotor flux and generic number of open circuit faults. The motor model in fault condition can be used for faults occurring on both adjacent and not adjacent phases. The model can be very useful both for simulation and implementation of fault-tolerant control strategies.
Modeling of surge and swab pressure of yield power law fluids
Erge, Öner; Akın, Serhat; Gücüyener, İsmail Hakkı; Department of Petroleum and Natural Gas Engineering (2016)
A mathematical modeling work and computational fluid dynamics (CFD) analysis of surge and swab pressures in concentric annuli is conducted. A commercial CFD package is used to validate the developed model of the flow during surge and swab in concentric annuli. Developed mathematical model incorporates the Yield Power Law (YPL) fluid behavior for closed-end pipes under laminar flow conditions. The results of the mathematical model and CFD analysis is compared with the models from literature. CFD analysis is ...
Modeling of Circular Double Flange Joint Including Contact and Friction Effects
Akay, Ahmet Arda; Yıldırım, Alper; Çöker, Demirkan; Kayran, Altan; Gürses, Ercan (2015-09-10)
Modeling of newtonian fluids and cuttings transport analysis in high inclination wellbores with pipe rotation
Sorgun, Mehmet; Parlaktuna, Mahmut; Aydın, İsmail; Department of Petroleum and Natural Gas Engineering (2010)
This study aims to investigate hydraulics and the flow characteristics of drilling fluids inside annulus and to understand the mechanism of cuttings transport in horizontal and deviated wellbores. For this purpose, initially, extensive experimental studies have been conducted at Middle East Technical University, Petroleum & Natural Gas Engineering Flow Loop using water and numerous drilling fluids for hole inclinations from horizontal to 60 degrees, flow velocities from 0.64 m/s to 3.05 m/s, rate of penetra...
Citation Formats
R. Keribar and Z. Dursunkaya, “Modeling of Piston Secondary Dynamics and Tribology,” 1991, Accessed: 00, 2021. [Online]. Available: