Results 51 to 60 of about 975,921 (127)

An experimental study of airfoil instability tonal noise with trailing edge serrations [PDF]

, 2013
This paper presents an experimental study of the effect of trailing edge serrations on airfoil instability noise. Detailed aeroacoustic measurements are presented of the noise radiated by an NACA-0012 airfoil with trailing edge serrations in a low to ...
Joseph, PF, Chong, TP
core   +1 more source

Flow Field Measurements to Characterize Flap Side-Edge Noise Generation [PDF]

, 2013
n this paper, the relation between noise generated at flap side-edges (FSE) and mean flow characteristics in the vicinity of the FSE solid surface is investigated.
Karl-Stephane S. Rossignol, Rossignol, Karl-Stephane   +1 more
core   +1 more source

Gurney flap effect using jet induced by plasma actuator

Nihon Kikai Gakkai ronbunshu, 2015
Lift and drag variations by plasma actuators have been investigated under flow at low Reynolds numbers ranging from 1.7×104 to 6.6×104. Wall-normal-jet type and counter-jet type plasma actuators are attached on the pressure surface near the trailing edge
Daiki SUZUKI, Yasuchika YUKI, Hitoshi ISHIKAWA, Takayasu FUJINO, Takehiko SEGAWA   +4 more
doaj   +1 more source

Experimental and numerical investigation of leading edge Krueger flaps at low Reynolds numbers [PDF]

, 2012
Recent publications examining the flight of Eagles have shown that leading edge feather deflections occur on the lower surface of the wings in free flight to create a leading edge flap analogous to a Krueger flap system.
Moraris, Vassilis Michael
core   +3 more sources

Low Speed Aerodynamic Performance Experimental Study of NACA 23012 Half-Span Wing

Journal of Aerospace Technology and Management
A six-component force balance was used to obtain the aerodynamic performance of a NACA 23012 half-span wing model at low freestream speeds of 20 m·s-1 to 50 m·s-1.
Afaq Altaf, Mohammed Abdulmalek Mohammed Aldheeb, Ashraf Ali Omar, Waqar Asrar   +3 more
doaj   +1 more source

Comparison of Aerodynamic Characteristics of Morphing and Conventional Wings [PDF]

INCAS Bulletin
The present research investigates the advantages of a morphing versus a hinged flap. The morphing wing model is equipped with a morphing trailing edge, while the conventional wing has a hinged flap system.
Mir Hossein NEGAHBAN, Ruxandra Mihaela BOTEZ   +1 more
doaj   +1 more source

Direct numerical simulation of turbulent flow past a trailing edge and the associated noise generation

, 2008
Direct numerical simulations (DNS) are conducted of turbulent flow passing an infinitely thin trailing edge (TE). The objective is to investigate the turbulent flow field in the vicinity of the TE and the associated broadband noise generation.
Sandberg, Richard D., Sandham, Neil D.
core   +1 more source

Optimization of the double-slot blown airfoil with jet at the leading and trailing edges of the flap

AIP Advances
An active lift augmentation technique combining trailing edge blowing and blown flap is explored in this study. A double-slot blown flap airfoil is designed based on NACA23015.
Songlin Xiang, Qing Wen, Meng Wei, Zhongren Jia   +3 more
doaj   +1 more source

Flow Control-Based Aerodynamic Enhancement of Vertical Axis Wind Turbines for Offshore Renewable Energy Deployment

Journal of Marine Science and Engineering
As wind energy development continues to expand toward nearshore and deep-sea regions, enhancing the aerodynamic efficiency of vertical axis wind turbines (VAWTs) in complex marine environments has become a critical challenge. To address this, a composite
Huahao Ou, Qiang Zhang, Chun Li, Dinghong Lu, Weipao Miao, Huanhuan Li, Zifei Xu   +6 more
doaj   +1 more source

Predefined-Time Direct Lift/Side-Force Control for Carrier Landing

Drones
Carrier-based fixed-wing UAV landing is challenged by deck motion, carrier airwake, gust disturbances, strong trajectory–attitude coupling, and actuator constraints.
Zishuang Pan, Dazhao Yu, Wei Han, Xichao Su, Jie Wang, Shansong Song, Bing Wan   +6 more
doaj   +1 more source