Results 1 to 10 of about 5,070,033 (225)

Enhancing the Performance of Piezoelectric Wind Energy Harvester Using Curve‐Shaped Attachments on the Bluff Body [PDF]

Global Challenges, 2023
This paper presents a piezoelectric wind energy harvester that operates by a galloping mechanism with different shaped attachments attached to a bluff body.
Prakash Poudel, Saurav Sharma, M. N. M. Ansari, Rahul Vaish, Rajeev Kumar, Sobhy M. Ibrahim, P. Thomas, Chris Bowen   +7 more
doaj   +3 more sources

Reinforcement learning for bluff body active flow control in experiments and simulations. [PDF]

Proc Natl Acad Sci U S A, 2020
Significance Reinforcement learning (RL) has been applied effectively in games and robotic manipulation. We demonstrate the effectiveness of RL in experimental fluid mechanics by applying it to reduce the drag of circular cylinders in turbulent flow, a ...
Fan D, Yang L, Wang Z, Triantafyllou MS, Karniadakis GE.   +4 more
europepmc   +2 more sources

Study of the flame flow and combustion characteristics of pool fires around a bluff body in the ship engine room

Case Studies in Thermal Engineering, 2021
In the development of a fire, all kinds of equipment in ship cabins cause flames to flow around them, which greatly affects the combustion characteristics of the flames.
Wei Liu, Liang Wang, Shichuan Su, Zhongzheng Wu, Yinshu Guo, Kunda Du   +5 more
doaj   +2 more sources

Experimental investigation of bluff body geometry effects on nitrogen oxides emissions from Cambridge stratified burner [PDF]

Scientific Reports
In this study, a series of experiments are done to analyze the effect of bluff body geometry on the NOx reduction of a natural gas-air stratified swirl burner.
Morteza Nahvi, Kiumars Mazaheri, Mohammad Zabetian Targhi, Fatemeh Eskandari   +3 more
doaj   +2 more sources

Dragonfly-Wing-Inspired Bluff-Body Piezoelectric Harvester for Efficient Low-Wind-Speed Energy Harvesting [PDF]

Micromachines
Inspired by the wing-opening morphology of dragonflies, a series of bio-inspired dragonfly-shaped bluff bodies are designed and investigated, and further integrated into a piezoelectric wind energy harvester.
Zhiyong Zhou, Xinyu Shang, Yebao Xia, Pei Zhu   +3 more
doaj   +2 more sources

Low-Wind-Speed Galloping Wind Energy Harvester Based on a W-Shaped Bluff Body

Energies
Galloping-based piezoelectric energy harvesting systems are being used to supply renewable electricity for low-power wireless sensor network nodes. In this paper, a W-shaped bluff body is proposed as the core component of a piezoelectric wind energy ...
Jianfeng Zheng, Zichang Li, Han Zhang
doaj   +2 more sources

Experimental studies of the effects of hydrophobic coatings on flow separation around 3D bluff bodies [PDF]

Advances in Aerodynamics
This study explores how hydrophobic coating influences the structure of the flow separation at the rear end of 3D bluff bodies. Two 3D representative bluff bodies, namely the standard Ahmed body (SAB), which features flow separation and reattachment at ...
Naseeb Ahmed Siddiqui, Martin Agelin-Chaab   +1 more
doaj   +2 more sources

Flow past a bluff body subjected to lower subcritical Reynolds number

Journal of Ocean Engineering and Science, 2020
The paper aimed to study the flow structure at the wake of the bluff body with altered blockage ratio (BR) keeping the fixed aspect ratio (AR). The study was conducted by a finite volume technique using commercial software Ansys-Fluent.
Pankaj Kumar, Santosh Kumar Singh
doaj   +2 more sources

A comparative study of gaseous fuel flame characteristics for different bluff body geometries

Case Studies in Thermal Engineering, 2022
Flame stabilization by a bluff-body is commonly used in many combustion applications to improve mixture characteristics, enhance flame stability and assist in combustion control.
I.A. Ibrahim, A.H. Shokry, M.M. Shabaan, H.M. Gad   +3 more
doaj   +1 more source

Comprehensive experimental study on bluff body shapes for vortex-induced vibration piezoelectric energy harvesting mechanisms

Energy Conversion and Management: X, 2022
Vortex-induced vibration (VIV) is an appropriate mechanism to harvest energy from the low-speed wind energy by flexible piezoelectric flags as transducers.
Iman Mehdipour, Francesco Madaro, Francesco Rizzi, Massimo De Vittorio   +3 more
doaj   +1 more source