Results 31 to 40 of about 62,218 (321)
Study of Torque, Drag and Hydraulics of a Deviated Drilled Well using Drilling Office Software [PDF]
Journal of Chemical and Petroleum Engineering, 2019 Rotational drilling was a revolution in drilling technology. It made the drilling process more efficient and faster and more depth of well could be achieved through rotation method.
Amir Hossein Saeedi Dehaghani +2 more
doaj +2 more sources
Optical alignment and spinning of laser-trapped microscopic particles [PDF]
, 1998 Light-induced rotation of absorbing microscopic particles by transfer of angular momentum from light to the material raises the possibility of optically driven micromachines.
A Ashkin +9 more
core +2 more sources
Applied Sciences, 2023 This paper focused on the investigation of the blades for a carousel rotor of a wind turbine with a vertical axis. Cross sections of the single coherent (SC) and the dual coherent (DC) blades were compared in terms of the aerodynamic forces and ...
Marcin Augustyn, Filip Lisowski
doaj +1 more source
Windage measurements in a rotor stator cavity with rotor mounted protrusions and bolts [PDF]
, 2012 This paper reports an experimental investigation of the windage associated with enclosed rotor-stator systems with superposed throughflow, as commonly found in gas turbine engines.
Coren, Daniel +2 more
core +1 more source
, 2010 We provide torque formulae for low mass planets undergoing type I migration in gaseous disks. These torque formulae put special emphasis on the horseshoe drag, which is prone to saturation: the asymptotic value reached by the horseshoe drag depends on a ...
Baruteau +26 more
core +1 more source
Platform, a Journal of Engineering, 2020 Different locations and field conditions require various drilling methods to produce oil and gas. Three major operational methods are identified to be slim holes, conventional and casing drilling.
Davood Zivar +3 more
doaj
Research on the aerodynamic characteristics of a lift drag hybrid vertical axis wind turbine
Advances in Mechanical Engineering, 2016 Compared with a drag-type vertical axis wind turbines, one of the greatest advantages for a lift-type vertical axis wind turbines is its higher power coefficient ( C p ).
Xiaojing Sun +5 more
doaj +1 more source
Drag-compensated, precision-powered hinge system [PDF]
, 1985 The design of a high precision powered hinge is complicated by the unavoidable presence of parasitic drag torque resulting mainly from friction and transfer of power, signals, and fluids across the hinge.
Jacquemin, G. G., Rusk, S. J.
core +1 more source
Advanced Functional Materials, EarlyView.The ultrahard teeth of mollusks that feed on rocky substrates contain a wear‐resistant coating on their surfaces consisting of densely packed mesocrystalline magnetic nanoparticles within an organic matrix. These coatings display significant hardness and toughness through their highly controlled mesocrystalline architectures.
Taifeng Wang +7 more
wiley +1 more source
On the horseshoe drag of a low-mass planet. I - Migration in isothermal disks
, 2009 We investigate the unsaturated horseshoe drag exerted on a low-mass planet by an isothermal gaseous disk. In the globally isothermal case, we use a formal- ism, based on the use of a Bernoulli invariant, that takes into account pressure effects, and that
Baruteau +10 more
core +1 more source