Results 21 to 30 of about 8,057 (285)

Torque and Drag Forces Problems in Highly Deviated Oil Well

open access: yesIraqi Journal of Chemical and Petroleum Engineering, 2018
Excessive torque and drag can be critical limitation during drilling highly deviated oil wells. Using the modeling is regarded as an invaluable process to assist in well planning and to predict and prevent drilling problems.
Hasan Ali Neamah   +1 more
doaj   +1 more source

Drag Torque and Synchronization modelling in a Dual Clutch Transmission [PDF]

open access: yes, 2018
Noise, vibration and harshness (NVH) is a big consideration in the automotive industry. In order to create an as pleasant driving experience as possible for the driver, NVH should be minimized. One of the sources of NVH comes from the transmission due to
Medleri Hire Math, Keerthi
core   +2 more sources

Flow structures and wall parameters on rotating riblet disks and their effects on drag reduction

open access: yesAlexandria Engineering Journal, 2022
The demand of energy saving and loss mitigation in modern industry gives rise to drag reduction techniques such as micro groove/riblet ever since the last century.
Tong Liang   +3 more
doaj   +1 more source

Multi-Objective Optimization of Drilling Trajectory Considering Buckling Risk

open access: yesApplied Sciences, 2022
Directional drilling involves three sections—vertical, curved, and horizontal—and is used for drilling offshore wells and mining unconventional resources.
Jiho Jeong   +4 more
doaj   +1 more source

An Experimental Study of Forced Vibration Influence on Disc Brake Drag Torque in Heavy Commercial Road Vehicles

open access: yes, 2022
Drag torque in a disc brake is the residual torque when the brake is not activated. This torque can adversely influence the total energy consumption, life of the brake components, and level of airborne wear particles from vehicles.
Hjelm, Rikard   +2 more
core   +2 more sources

Wind tunnel experimental study on static aerodynamic performance of SB-VAWT without intermediate support axes

open access: yesFrontiers in Energy Research, 2023
Wind power generation is considered an effective way for ships to harness wind energy, and the aerodynamic characteristics of wind turbines determine wind energy utilization and efficiency.
Huawu Zhang, Yihuai Hu
doaj   +1 more source

Understanding the drag torque in common envelope evolution

open access: yesPublications of the Astronomical Society of Australia
Abstract Common envelope (CE) evolution is largely governed by the drag torque applied on the in-spiralling stellar components by the envelope. Previous work has shown that idealized models of the torque based on a single body moving in rectilinear motion through an unperturbed atmosphere can be highly inaccurate.
Soumik Bhattacharyya   +4 more
openaire   +2 more sources

Research on the aerodynamic characteristics of a lift drag hybrid vertical axis wind turbine

open access: yesAdvances 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

Research on drivability control in P2.5 hybrid system

open access: yesEnergy Reports, 2021
The control of drivability in this paper contains the clutch start, the engine and motor anti-jerk control during tip in and tip out. First, the fast clutch start is divided into five phases as well as the smooth clutch start: the gear selection phase ...
Junchao Jing   +5 more
doaj   +1 more source

Advances in Sustainable and Wearable Textile Based Soft Robotics

open access: yesAdvanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas   +6 more
wiley   +1 more source

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