Results 61 to 70 of about 1,736 (190)

Passive flow control devices for road vehicles: A comprehensive review

Engineering Science and Technology, an International Journal
Aerodynamic drag reduction is considered to be one of the most effective ways to minimize fuel consumption. Hence, this work focuses on reviewing some of the most promising passive flow control techniques for drag and lift reduction in automotive ...
Md. Nazmus Salehin, Nayem Zaman Saimoon, Mim Mashrur Ahmed, Md. Rabiul Islam Sarker, Mahadi Hasan Masud   +4 more
doaj   +1 more source

Load Reduction Using Rapidly Deployed Trailing-Edge Flaps

, 2009
This thesis details investigations into the aerodynamic properties of a small, rapidlyactuated, actively controlled trailing-edge ap and the potential of such a device to alleviate the unsteady loading experienced by wind turbine blades due to ...
Frederick, Mark, Frederick, Mark
core   +1 more source

Darrieus Vertical Axis Wind Turbine (VAWT) Performance Enhancement by Means of Gurney Flap

Machines
This study investigates the aerodynamic effect of Gurney flaps (GFs) of different heights on the performance of a Darrieus vertical axis wind turbine (VAWT).
Hanif Ullah, Vincenzo Gulizzi, Antonio Pantano, Zhongsheng Deng, Qing Xiao   +4 more
doaj   +1 more source

Aerodynamic performance and wake development of NACA 0018 airfoil with serrated gurney flaps

Frontiers in Energy Research
Improving the aerodynamic performance of the airfoil is important for optimising the rotor efficiency of the vertical axis wind turbines. As a simple passive control method, the Gurney flap is widely used to improve the aerodynamic performance of ...
Zhehui Zheng, Liu Chen
doaj   +1 more source

INTRUDER: a device to improve hull performances [PDF]

The intruder is a device that has been used for a long time now on big fast monohulls like "Acquastrada". It consists of a small vertical thin plate positioned under the transom of a planing or semi-planing hull, jutting out just a few millimetres. It is
Mancini, Andrea, Moriconi, Alessandro
core  

Aerodynamics of gurney flaps on a wing in ground effect

AIAA Journal, 2001
A study was performed of a single-element, high-lift wing fitted with Gurney flaps in ground effect. The effect of the Gurney has been quantified in terms of aerodynamic performance and flow field characteristics. The results are of direct relevance to both aeronautical and racing car applications.
Zerihan, Jonathan, Zhang, Xin
openaire   +3 more sources

Development and Measurement of a Very Thick Aerodynamic Profile for Wind Turbine Blades

Wind
We designed 60% thick airfoil to improve the aerodynamic performance in the root region of wind turbine rotor blades, taking into account current constraints.
Alois Peter Schaffarczyk, Brandon Arthur Lobo, Nicholas Balaresque, Volker Kremer, Janick Suhr, Zhongxia Wang   +5 more
doaj   +1 more source

Preliminary assessment of the NACA0021 trailing edge wedge for wind turbine application. [PDF]

Heliyon, 2023
Abdalkarem AAM, Ansaf R, Muzammil WK, Ibrahim A, Harun Z, Fazlizan A.   +5 more
europepmc   +1 more source

Numerical simulation of Gurney flap on SFYT15thick airfoil

Theoretical and Applied Mechanics Letters, 2016
AbstractA two-dimensional steady Reynolds-averaged Navier–Stokes (RANS) equation was solved to investigate the effects of a Gurney flap on SFYT15thick airfoil aerodynamic performance. This airfoil was designed for flight vehicle operating at 20 km altitude with freestream velocity of 25 m/s.
He, Xi, Wang, Jinjun, Yang, Muqing, Ma, Dongli, Yan, Chao, Liu, Peiqing   +5 more
openaire   +1 more source

Near- and Far-Field Acoustic Characteristics and Sound Source Localization Performance of Low-Noise Propellers with Gapped Gurney Flap

Drones
With the rapid industrialization utilizing multi-rotor drones in recent years, an increase in urban flights is expected in the near future. This may potentially result in noise pollution due to the operation of drones.
Ryusuke Noda, Kotaro Hoshiba, Izumi Komatsuzaki, Toshiyuki Nakata, Hao Liu   +4 more
doaj   +1 more source