Results 41 to 50 of about 2,912 (220)

Efficient Harvesting of Irregular and Low‐Frequency Mechanical Energy via Hybridized Electromagnetic‐Triboelectric Systems

Small, EarlyView.
ABSTRACT The rapid expansion of the Internet of Things (IoT) and wearable electronics necessitates sustainable power sources to replace the limited electrochemical battery. While mechanical energy harvesting offers a promising solution, traditional harvesters face challenges of irregular and low−frequency environmental sources. This review presents the
Yongbin Han, Ju‐Hyuck Lee, Hong‐Joon Yoon   +2 more
wiley   +1 more source

Development of Vertical Wind Turbine Blades Using 4D Printing of Composites

Polymer Composites, Volume 47, Issue 12, Page 10966-10975, 20 June 2026.
Vertical axis wind turbine: White blade: Commercial. Black blade: Composite. ABSTRACT This paper presents the procedure to make vertical wind turbine blades using the technique of 4D printing of composites (4DPC). The blades are made using carbon/epoxy composite materials with a fiber volume fraction of about 60%.
Emad Fakhimi, Suong Van Hoa
wiley   +1 more source

Aerodynamic Characteristics of Airfoils Equipped With Gurney Flaps and Vortex Generators for the Entire Range of Pitch Angles

Wind Energy, Volume 29, Issue 5, May 2026.
ABSTRACT An experimental study of NACA0021 airfoil equipped with vortex generators (VGs) and Gurney flaps (GFs) was conducted to assess the effects of these devices on the aerodynamic airfoil performance, the information that is necessary for studying the self‐starting characteristics of vertical axis wind turbines (VAWTs).
Marin Ivanković, Marvin Jentzsch, Marinos Manolesos, Christian Navid Nayeri, Hrvoje Kozmar   +4 more
wiley   +1 more source

Computational fluid dynamics on a newly developed Savonius rotor by adding sub-buckets for increase of the tip speed ratio to generate higher output power coefficient

Journal of Fluid Science and Technology, 2020
The output power coefficient of the Savonius rotor needs to be improved in attaining better practical applications. Up until now, to improve the output power coefficient, the newly developed Savonius rotor with semi-elliptical sub-buckets has been ...
Takanori MATSUI, Tomohiro FUKUI, Koji MORINISHI   +2 more
doaj   +1 more source

Decentralized Wind Energy Systems as Catalysts for Urban Resilience: A Design Framework

Energy Science &Engineering, Volume 14, Issue 2, Page 682-700, February 2026.
ABSTRACT Confronting the escalating extreme weather events (EWEs) and intensifying winds, this study proposes an active response to these issues by exploring decentralized wind energy production for Peng Chau Island, Hong Kong. It integrates theoretical perspectives on energy democracy—empowering local communities through energy autonomy—and urban ...
Tian Cheng
wiley   +1 more source

Geometrical optimization of a swirling Savonius wind turbine using an open jet wind tunnel

, 2016
It has been suggested that waste heats or naturally available heat sources can be utilized to produce swirling flow by a design similar to that of split channels which is currently used to initiate fire whirls in laboratories. The new design combines the
Ahmad Sharifian, Abdullah Al-Faruk, Al-Faruk, Abdullah, Sharifian, Ahmad   +3 more
core   +1 more source

Performance of Double-step Savonius Rotor for Environmentally Friendly Hydraulic Turbine

Journal of Fluid Science and Technology, 2008
The aim of this investigation is to develop an environmentally friendly nano-hydraulic turbine. Three type models of Savonius rotor are constructed and tested in a water tunnel to improve and clarify the power performance.
Miyoshi NAKAJIMA, Shouichiro IIO, Toshihiko IKEDA   +2 more
doaj   +1 more source

Advances in research on impulse hydro‐turbine technology

River, Volume 5, Issue 1, Page 112-133, February 2026.
Abstract To accelerate the development of impulse hydro‐turbines and support the efficient utilization of hydropower resources in Southwest China, this paper examines the background, historical development, and research progress of impulse hydro‐turbines.
Xiaochao Li, Ye Zhou, Hao Zhang, Guanglei Xiao, Yanwei Li, Zhongxin Gao, Zhiyang Lu, Shangqi Li   +7 more
wiley   +1 more source

Performance of Savonius Rotor for Environmentally Friendly Hydraulic Turbine

Journal of Fluid Science and Technology, 2008
The aim of this investigation was to develop an environmentally friendly nano-hydraulic turbine. A model of a two-bucket Savonius type hydraulic turbine was constructed and tested in a water tunnel to arrive at an optimum installation condition.
Miyoshi NAKAJIMA, Shouichiro IIO, Toshihiko IKEDA   +2 more
doaj   +1 more source

The aerodynamics of a Savonius blade

EPJ Web of Conferences
Faced with the energy crisis and global warming, renewable energies are emerging as a key response, particularly wind power. Among these various technologies, vertical axis wind turbines (VAWTs) present a promising energy source in rural areas. The Savonius rotor, a drag-driven device, one of the famous vertical axis wind turbine designs, offers many ...
Khalid Mrigua, Ahmed El Mimouni, Abdessamad Didi, Hakim El Houjaji, Zouhair Sadoune   +4 more
openaire   +1 more source