Results 11 to 20 of about 4,537 (232)

Static Performance Measurements and Model Predictions of Gas Foil Thrust Bearing with Curved Incline Geometry

Lubricants, 2023
Gas foil thrust bearings (GFTBs) have been successfully used to support the axial load of oil-free microturbomachinery with low drag friction due to the low viscosity of gas or air used as a bearing lubricant.
Sung Ho Hwang, Syed Muntazir Mehdi, Tae Ho Kim   +2 more
doaj   +1 more source

Mathematical Model of Drag Torque with Surface Tension in Single-Plate Wet Clutch

Chinese Journal of Mechanical Engineering, 2019
Reduction of drag torque in disengaged wet clutches is essential for transmission research because it is one of the potentials of efficiency improvement.
Zengxiong Peng, Shihua Yuan
doaj   +1 more source

Torque and Drag Forces Problems in Highly Deviated Oil Well

Iraqi 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, Ayad A.Alhaleem A.Alrazzaq   +1 more
doaj   +1 more source

Multi-objective Optimization Design of Wet Friction Clutches

Jixie chuandong, 2023
The drag torque of the wet clutch affects the efficiency of the transmission, and the engagement torque of the clutch affects the reliability of the transmission.
Jiang Kai, Li Hua, Chen Si, Li Shilei, Ren Rongzhi   +4 more
doaj  

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

Alexandria 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, Yang Xu, Jiawen Li, Guobiao Cai   +3 more
doaj   +1 more source

Multi-Objective Optimization of Drilling Trajectory Considering Buckling Risk

Applied Sciences, 2022
Directional drilling involves three sections—vertical, curved, and horizontal—and is used for drilling offshore wells and mining unconventional resources.
Jiho Jeong, Chaeog Lim, Byeong-Cheol Park, Jeonghoon Bae, Sung-chul Shin   +4 more
doaj   +1 more source

Analysis and Suppression Method of Drag Torque in Wide-Speed No-Load Wet Clutch

Actuators
Under no-load conditions, the wet clutch of vehicles generates drag torque across a wide speed range, which increases power loss in the transmission system and significantly impacts its efficiency and reliability.
Rui Liu, Chao Wei, Lei Zhang, Lin Zhang, Siwen Liang, Mao Xue   +5 more
doaj   +1 more source

Prediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling

Tribology Online, 2016
In the automotive industry one of the crucial issues is reduction of CO2 emission to protect environment. A lot of researches have been done to reduce the CO2 emission of cars by improving efficiency of engine and engine parts or lowering the weight ...
Shahjada Ahmed Pahlovy, Syeda Faria Mahmud, Masamitsu Kubota, Makoto Ogawa, Norio Takakura   +4 more
doaj   +1 more source

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

Frontiers 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

Research on drivability control in P2.5 hybrid system

Energy 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, Yiqiang Liu, Jie Wu, Weishan Huang, Botao Zuo, Guikang Yang   +5 more
doaj   +1 more source