Results 81 to 90 of about 36,102 (211)

Flutter speed estimation using presented differential quadrature method formulation

open access: yesEngineering Applications of Computational Fluid Mechanics, 2019
In this paper the flutter behavior of a typical wing is investigated. The study is performed by presented Deferential Quadrature Method (DQM). The aerodynamic part adopted Wagner functions to model subsonic regime.
Mohammad Ghalandari   +3 more
doaj   +1 more source

Wind Turbine Airfoil Noise Prediction Method Based on Generalized Airfoil Database and Residual Neural Network

open access: yesApplied Sciences
To address the limitations of existing wind turbine airfoil databases, the high computational cost, and low efficiency of noise prediction, this paper proposes a wind turbine airfoil noise prediction method based on generalized airfoil sets and residual ...
Quan Wang   +3 more
doaj   +1 more source

Design and performance of an open jet wind tunnel for aero-acoustic measurement [PDF]

open access: yes, 2009
This paper presents the design and performance of an open jet, blow down wind tunnel that was newly commissioned in the anechoic chamber at the ISVR, University of Southampton, UK. This wind tunnel is intended for the measurement of airfoil trailing edge
Chong, T.P.   +5 more
core   +1 more source

Direct numerical simulations of forced and unforced separation bubbles on an airfoil at incidence [PDF]

open access: yes, 2008
Direct numerical simulations (DNS) of laminar separation bubbles on a NACA-0012 airfoil at Re-c = 5 x 10(4) and incidence 5 degrees are presented. Initially volume forcing is introduced in order to promote transition to turbulence.
Jones, L.E.   +2 more
core   +1 more source

Airfoil Design and Flow Analysis of a Multi-Blade Centrifugal Fan: An Experimental and Simulation Study

open access: yesApplied Sciences
To overcome the technical challenges of the multi-blade centrifugal fan, such as low efficiency and insufficient total pressure, the blades of the fan were optimally designed in this study.
Haonan Yin   +4 more
doaj   +1 more source

The Harmonic Pitching NACA 0018 Airfoil in Low Reynolds Number Flow

open access: yesEnergies
This study investigates the aerodynamic performance of a symmetric NACA 0018 airfoil under harmonic pitching motions at low Reynolds numbers, a regime characterized by the presence of laminar separation bubbles and their impact on aerodynamic forces. The
Jan Michna   +2 more
doaj   +1 more source

Effect of Airfoil's Attack Angle and Airfoil‐Cylinder Configuration on Turbulence Parameters and Airfoil's Aerodynamic Efficiency

open access: yesEnergy Science & Engineering
ABSTRACT The increasing demand for energy in daily life and the finite nature of fossil fuel reserves have driven researchers worldwide to explore renewable energy sources such as wind energy. To optimize the performance and minimize energy losses in vertical wind turbines, parameters such as the airfoil's angle of attack, as well as ...
Reza Abbaspour   +2 more
openaire   +1 more source

Assessment of Airfoil Lightning Strikes Characterization on Aircraft in Dynamic Conditions

open access: yesAtmosphere
Lightning is a long-gap high-current discharge event in nature, and its enormous discharge energy can cause structural damage to struck objects. Relevant studies have shown that aircraft in the air are exposed to a higher risk of lightning strikes than ...
Ning Yang   +4 more
doaj   +1 more source

Research progress on aerodynamic stealth design technology of aircraft

open access: yesHangkong gongcheng jinzhan
Aerodynamic stealth design is a key technology for aircraft to realize efficient combat in high-risk environments,and it has been a hot technology researched by aviation powers for a long time.
ZHAO Ke   +5 more
doaj   +1 more source

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