Results 31 to 40 of about 73,982 (212)

Numerical Simulation of Flapping Airfoil Aerodynamic Characteristics

Applied Sciences
Flapping airfoil flight technology is widely used in defense and civilian fields, and huge economic benefits can be created. The bionic flapping airfoil is the research object of this paper.
Junjie Xu, Shizhen Zheng, Ziyu Guo, Jianlong Chang   +3 more
doaj   +1 more source

Aerodynamic Shape Optimization of NREL S809 Airfoil for Wind Turbine Blades Using Reynolds-Averaged Navier Stokes Model—Part II

Applied Sciences, 2021
Sustainability has become one of the most significant considerations in everyday work, including energy production. The fast-growing trend of wind energy around the world has increased the demand for efficient and optimized airfoils, which has paved the ...
Md Tausif Akram, Man-Hoe Kim
doaj   +1 more source

Sinusoidal-gust generation with a pitching and plunging airfoil

, 2019
The generation of uniform, periodic gust disturbances in an experimental context is demonstrated using a single oscillating airfoil. A pitching and heaving symmetric airfoil is suggested as a simpler alternative to existing gust-generation methods.
Kissing, Johannes, Tropea, Cameron, Wei, Nathaniel J.   +2 more
core   +1 more source

Large airfoil models

Computers & Fluids
The development of a Large Airfoil Model (LAM), a transformative approach for answering technical questions on airfoil aerodynamics, requires a vast dataset and a model to leverage it. To build this foundation, a novel probabilistic machine learning approach, A Deep Airfoil Prediction Tool (ADAPT), has been developed.
Howon Lee, Aanchal Save, Pranay Seshadri, Juergen Rauleder   +3 more
openaire   +2 more sources

Aerodynamics of an airfoil with leading‐edge icing

Wind Energy, 2021
The flow over the leading edge of an NREL S826 reference airfoil with three different icing‐inspired leading‐edge contamination geometries has been assessed experimentally. Particle image velocimetry was performed on the leading edge of the airfoil for a
Magnus K. Vinnes, R. Jason Hearst
doaj   +1 more source

Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow

Applied Sciences, 2021
Dynamic stall in clean air flow has been well studied, but its exploration in air–particle (air–raindrop or air–sand) flow is still lacking. The aerodynamic performance loss of aircraft (NACA0012) and wind turbine (S809) airfoils and their differences ...
Junjun Jin, Zhiliang Lu, Tongqing Guo, Di Zhou, Qiaozhong Li   +4 more
doaj   +1 more source

Improving Airfoil Drag Prediction [PDF]

34th Wind Energy Symposium, 2016
An improved formulation of drag estimation for thick airfoils is presented. Drag underprediction in XFOIL-like viscous-inviscid interaction methods can bequite significant for thick airfoils usedinwind turbine applications (up to 30%, as seen in the present study).
Ozdemir, H., Ramanujam, G., Hoeijmakers, H.W.M.   +2 more
openaire   +3 more sources

Impacts of external airfoil flaps on the S809 airfoil [PDF]

Scientific Reports
Yin R.
openaire   +2 more sources

Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios

Applied Sciences, 2021
A dynamic stall will cause dramatic changes in the aerodynamic performance of the blade, resulting in a sharp increase in the blade vibration load. The bionic leading-edge airfoil with different waviness ratios, inspired by the humpback whales flipper ...
Liming Wu, Xiaomin Liu
doaj   +1 more source

Airfoil disperses smokestack effluents upward [PDF]

, 1975
System consists of negative-lift airfoil mounted at or near top of smokestack without obstructing flow of effluents from stack. Controls adjust negative lift and drag of airfoil, for changing orientation of airfoil to maintain proper airflow over foil ...
Costen, R. C.
core   +1 more source