Results 161 to 170 of about 226,450 (350)

Research on the Mechanism of Sand Bridge Stuck Drill in Deep Coal and Rock Gas Horizontal Wells

Energy Science &Engineering, EarlyView.
Accounting for wellbore collapse debris and the bulldozer effect, this study develops models for permeable and impermeable sand bridge sticking in deep CBM horizontal wells, deriving resistance and volume formulations. Validated in Changqing, results show impermeable bridges dominate; controls (fluid optimization, staged drilling, circulation, speed ...
Cheng Hui, Yong Ouyang, Zhifeng Duan, Xiaoyue Xu, Yuxiang Teng, Mingyang Liu, Hui Zhang, Long Chen   +7 more
wiley   +1 more source

Development of a Heat Transfer Model for a Free Double Piston and Identification of Thermal Management Challenges [PDF]

Konstantinos Fotis, Zinon Vlahostergios, Dimitrios Misirlis, Kyros Yakinthos   +3 more
openalex   +1 more source

Noise, Vibration, and Harshness (NVH) Challenges in Hydrogen Internal Combustion Engine Vehicles

Energy Science &Engineering, EarlyView.
ABSTRACT This paper presents a state‐of‐the‐art literature review on noise, vibration, and harshness (NVH) in hydrogen‐fuelled internal combustion engines. Studies published between 2011 and 2025 were screened, covering fundamental flame physics, test‐bench work, and recent prototype vehicles.
Krisztián Horváth
wiley   +1 more source

Both piston-like and rotational motions are present in bacterial chemoreceptor signaling [PDF]

, 2015
Daqi Yu, Xiaomin Ma, Yuhai Tu, Luhua Lai
openalex   +1 more source

Failure Mechanism of Asymmetric Large Deformations Under Repeated Mining in Roadways

Energy Science &Engineering, EarlyView.
Principal stress‐evolution diagram at different advance positions of 42205 working face. ABSTRACT To address the challenge of controlling severe asymmetrical deformation in roadways subjected to repeated mining, this study (i.e., based on the engineering context of the Buertai Coal Mine) investigated the characteristics of the regional stress field in ...
Ai‐Rong Wang, Tao Peng, Kang Zhou, Chong‐Yu Song   +3 more
wiley   +1 more source

Modeling and Control of Hydraulic Linear and Free-Piston Engines.

, 2013
Kevin Zaseck
openalex   +2 more sources

Simulation of piston and piston ring dynamics

, 2019
Piston group is the main contributor to friction with an amount of 40%-50% of the total IC engine friction. The market is looking for efficient friction reduction methods without drawbacks in durability and NVH. In light of this, efficient parameter studies and optimization processes in multibody dynamics simulation are becoming increasingly important ...
openaire   +1 more source

Computational Analysis of Spray Angle Effects on Combustion and Emissions in Methane‐Diesel Dual‐Fuel Engine

Energy Science &Engineering, EarlyView.
This study concluded that wider spray angles produce wall impingement and greater unburned hydrocarbons in methane‐diesel dual‐fuel engines, whereas 110° balances efficiency and emissions. ABSTRACT A diesel methane dual fuel engine appears as a potential means for lowering emissions while retaining useful thermal efficiency.
Abdullah Al Rifat, Md. Arafat Rahman, Md. Mizanur Rahman, Tafsirul Hassan, Md Nazmul Haque   +4 more
wiley   +1 more source

Multi-mode fault dataset for aviation piston pump based on standard test procedure. [PDF]

Data Brief
Wang T, Ma J, Fu Y.
europepmc   +1 more source

Critical Review on the Molecular Behavior of Surfactants at the Oil–Water Interface During Oil Displacement

Energy Science &Engineering, EarlyView.
This review systematically explores the molecular behavior of diverse surfactants (anionic, cationic, nonionic, amphoteric) at the oil–water interface through molecular dynamics simulations. It highlights their roles in reducing interfacial tension, altering interfacial structure, and enhancing oil recovery efficiency.
Zhaowei Hou, Wenchao Jiang, Xiaolin Wu, Jian Gai, Liqiang Zheng, Jie Chen, Shuanghua Wang, Shouliang Lu, Bin Huang, Jichao Sun, Long Su   +10 more
wiley   +1 more source