Results 71 to 80 of about 276,420 (309)

Spa “Mashproekt” Reversible Power Turbines [PDF]

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery, 1994
The gas turbine engines incorporating reversible power turbines have been designed and developed by the MASHPROEKT Scientific and Production Association (SPA). They are widely used for powering the former USSR (Russia) Navy ships, as well as the CAPITAN SMIRNOV Ro-Ro type cargo vessels.
V. I. Romanov, O. G. Zhiritsky, V. E. Belyaev, V. V. Lupandin   +3 more
openaire   +1 more source

Superelastic High‐Entropy Oxide Ceramic Aerogels for Thermal Superinsulation and Sealing at Extreme Conditions

Advanced Science, EarlyView.
A high‐entropy oxide ceramic of (Gd1/2Lu1/2)2(Ti1/3Zr1/3Hf1/3)2O7 is prepared through a molecular synthesis route of pyrolytic solid‐solution reactions. The architectured nanofiber aerogel manifests unprecedented thermomechanical properties, including superelastic compressibility of 98% from −196 to 1500 °C, and thermal superinsulation capacity (24.14 ...
Xiaoke Jiang, Tao Du, Hengzhong Fan, Junhong Liu, Yunfeng Su, Peng He, Hongxiang Chen, Litian Hu, Yongsheng Zhang, Qiangqiang Zhang   +9 more
wiley   +1 more source

Numerical Investigation of the Effects of Leakage Flow From Guide Vanes of Francis Turbines using Alternative Clearance Gap Method

Journal of Applied Fluid Mechanics, 2020
Flow around the Guide vanes (GV) in Francis turbine differs with the shape of hydrofoils. The difference in the pressure of fluid travelling to pressure side and suction side of GV contributes to flow behavior. This study presents the numerical technique
S. Gautam, H. P. Neopane, B. S. Thapa, S. Chitrakar, B. Zhu   +4 more
doaj  

In‐Wheel Piezoelectric DC Power Generator With Zero Resistive Torque

Advanced Science, EarlyView.
In this paper, we present a wheel‐shaped direct‐current piezoelectric generator (DC‐PG) that fundamentally overcomes these constraints by producing phase‐stable DC electricity directly from rolling motion. By embedding this system into suitcase wheels, we demonstrated a fully integrated real‐time location tracking system powered solely by mechanical ...
Hyun Soo Kim, Hyunseok Song, In Woo Oh, Dong‐Gyu Lee, Tae Kyoung Yoon, Jeyeon Lee, Byoung Jin Yoon, So‐Min Song, Iman M. Imani, Seohyun Cho, Seong Jin Kim, Chong‐Yun Kang, Sahn Nahm, Yong Seok Park, Kyung‐Hoon Cho, Jungho Ryu, Jeong Min Baik, Jun Chen, Sunghoon Hur, Hyun‐Cheol Song   +19 more
wiley   +1 more source

Investigations on microstructural and mechanical properties of long-term thermally exposed superalloy Mar-M247 after rejuvenation heat treatment

Journal of Materials Research and Technology
Mar-M247 is a polycrystalline nickel-based superalloy utilized for blades in heavy-duty gas turbines. However, the microstructure degradation of the alloy during long-term aging includes coarsening of the γ′ phase and precipitation of TCP phase, which ...
Song Wu, Lexin Yang, Yubing Pei, Fenling Wang, Changshuai Wang, Chao Luo, Bin Zhou, Xiufang Gong   +7 more
doaj   +1 more source

Fault Detection and Diagnosis for Gas Turbines Based on a Kernelized Information Entropy Model

The Scientific World Journal, 2014
Gas turbines are considered as one kind of the most important devices in power engineering and have been widely used in power generation, airplanes, and naval ships and also in oil drilling platforms.
Weiying Wang, Zhiqiang Xu, Rui Tang, Shuying Li, Wei Wu   +4 more
doaj   +1 more source

Towards Climate Neutrality by 2050: Role of Aluminum for Short‐ and Long‐Term Energy and Hydrogen Storage

Advanced Energy Materials, EarlyView.
The Aluminum energy storage cycle involves the use of renewable energy for Al production and the generation of heat (dry cycle) and heat and H2 (wet cycle) for energy production via Al‐steam combustion. ABSTRACT Reaching climate neutrality by 2050 requires innovative long‐term energy storage (LTES) solutions beyond the current use of fossil fuels ...
Lorenzo Trombetti, Stefano Passerini, Linda Barelli   +2 more
wiley   +1 more source

Offshore Turbine Wake Power Losses: Is Turbine Separation Significant?

Energy Procedia, 2017
Abstract This paper presents the results of a parametric study of wind turbine wake effects in a hypothetical offshore wind farm with varying turbine separation using a Computational Fluid Dynamics (CFD) model. Results are analyzed from a simulated 40 turbine farm with 60 layout options, 4 wind speeds and 10° directional bins.
P. Argyle, S.J. Watson
openaire   +1 more source

A Practical Model and an Optimal Controller for Variable Speed Wind Turbine Permanent Magnet Synchronous Generator [PDF]

, 2017
The aim of this paper is the complete modeling and simulation of an optimal control system using practical setup parameters for a wind energy conversion system (WECS) through a direct driven permanent magnet synchronous generator (D-PMSG) feeding ac ...
Cossar, Calum, Mehran, Kamyar, Rezaei, Najmeh   +2 more
core   +1 more source

Leveraging Wind Energy for Electricity and Hydrogen Production: A Sustainable Solution to Power Shortages and Eco‐Friendly Alternative Fuel

Advanced Energy and Sustainability Research, EarlyView.
The article attracts researchers, policymakers, and industry leaders in renewable energy, hydrogen, and sustainable development, as it addresses the critical need for clean, efficient energy solutions. By evaluating the technical, environmental, and economic feasibility of integrating wind energy with hydrogen production. The findings offer significant
Mohamed Elnaggar, Wael A. Salah, Hala J. El‐Khozondar, Yasser F. Nassar, Mohammed J. K. Bashir   +4 more
wiley   +1 more source