Results 51 to 60 of about 1,405,477 (232)

PID controller parameter optimization for ship fin stabilizers based on an improved secretary bird optimization algorithm

Scientific Reports
Fin stabilizers governed by proportional-integral-derivative (PID) controllers dominate active ship roll reduction, yet their performance depends critically on gain tuning under nonlinear hydrodynamics and time-varying sea states.
Linchang Ye, Yun Liu, Jifu Guo, Miao Zhang, Dong Zhang, Zongpeng Tong, Jianping Shen   +6 more
doaj   +1 more source

Analysis of Carbon Particulate Matter Removal Performance of Dual-Fuel Marine Engine with DOC + CDPF

Atmosphere, 2023
This study analyzes Diesel Oxidation Catalyst (DOC) and Carbon Diesel Particulate Filter (CDPF) after-treatment systems integrated into a WARTSILA W20DF marine dual-fuel engine. The CDPF was coated with a non-precious metal catalyst whose catalytic redox
Zhiyuan Yang, Zhiwen Tan, Qinming Tan, Shien Tu   +3 more
doaj   +1 more source

Effects of hybrid metal oxide nanoparticles on the tribological and emission attributes of algae‐derived biofuel in compression ignition engines

Environmental Progress &Sustainable Energy, EarlyView.
Abstract The growing demand for sustainable fuels has accelerated the development of algae‐derived biodiesel for compression‐ignition engines. In this study, Chlorella vulgaris methyl ester (AME) exhibited physicochemical properties comparable to diesel and satisfied ASTM D6751 fuel quality requirements, making it suitable for blending.
T. Jayakumar, A. Kumaravadivel, I. Rahamathullah, J. Arunprasad   +3 more
wiley   +1 more source

A Review of Prognostic and Health Management (PHM) Methods and Limitations for Marine Diesel Engines: New Research Directions

Machines, 2023
Prognostic and health management (PHM) methods focus on improving the performance and reliability of systems with a high degree of complexity and criticality. These systems include engines, turbines, and robotic systems.
Hla Gharib, György Kovács
doaj   +1 more source

Multi‐Objective RSM Optimization of Emission and Performance Characteristics in a Diesel Engine Fueled With BaTiO3 Nano‐Enhanced Jojoba Biodiesel

Energy Science &Engineering, EarlyView.
This study uses response surface methodology to optimize Jojoba biodiesel blended with BaTiO3 nanoparticles in a single‐cylinder diesel engine. Results show that ~48.95–51.31 ppm of BaTiO3 achieves balanced performance and emission, decreasing CO and NOx while increasing torque and brake thermal efficiency.
Arif Savaş, Ramazan Şener, Stefano Mauro, Oğuzhan Der, Samet Uslu   +4 more
wiley   +1 more source

A Novel Modular Multi-Unit Cell Permanent Magnet Thrust Bearing with Bionic Design and Load-Carrying Capacity Analysis

Applied Sciences
Permanent magnet thrust bearings have garnered significant attention due to their high rotational speeds, low noise levels, and excellent vibration-damping performance.
Xiangdong Yu, Qi Wang, Zhongsheng Yan, Wenfeng Yu, Xingyue Shang, Suimeng Zhou, Jimin Zhang   +6 more
doaj   +1 more source

Synergistic Regulation of Common Rail Pressure and Injection Angle on Heavy‐Duty Diesel Engine Performance

Energy Science &Engineering, EarlyView.
Synergistically optimizing the common rail pressure and injection timing of a heavy‐duty diesel engine while focusing on both engine performance and NVH characteristics. Consideration of unregulated pollutant NH3 emissions from heavy‐duty diesel engines.
Tao Zhou, Lei Pang, Yu Lyu, Hui Xu, Jianxun Tan, Yu Gu, Guisheng Chen   +6 more
wiley   +1 more source

Modeling and Analysis of Actuators in Multi-Pump Waterjet Propulsion Systems

Journal of Marine Science and Engineering
Waterjet propulsion, which generates thrust by ejecting water jets, has attracted significant attention in modern high-performance vessels due to its efficiency, superior cavitation resistance, and excellent maneuverability.
Shuli Jia, Yinuo Guo, Yuxue Liu, Dali Wei, Chong Qu, Liyong Ma   +5 more
doaj   +1 more source

Unlocking Hydrokinetic Energy in the Brazilian Amazon: A Statistical Resource Assessment and Economic Feasibility Analysis

Energy Science &Engineering, EarlyView.
This study develops a spatial and technical framework to evaluate hydrokinetic energy potential in the Amazon as a sustainable alternative to diesel‐based systems. By modeling regional resources, we demonstrate that hydrokinetic sources offer a cleaner, economically competitive solution for displacing fossil fuels in remote riverine communities ...
Ana Cláudia Pinto Ferraz, Ivan Felipe Silva dos Santos, Marina Batalini Macedo, Regina Mambeli Barros, Janayna Alves Romil dos Santos   +4 more
wiley   +1 more source

Transient torsional vibration analysis of marine diesel engine under short-circuit impact

Zhongguo Jianchuan Yanjiu
ObjectivesIn order to formulate an optimization scheme for the torsional vibration parameters of a marine diesel generator shaft system, it is necessary to analyze the transient torsional vibration characteristics of the diesel generator under short ...
Congcong XU, Gang LIANG, Jie TAO, Yafei JIAO, Jinyuan CHEN, Pengcheng WANG, Mengcan DENG   +6 more
doaj   +1 more source