Results 31 to 40 of about 36,102 (211)
Energy Reports, 2022 Inspired from the special structure of dragonfly wings (cambered and corrugated groove), in this work, the bioinspired dimple structure is introduced into the design of the airfoil to improve the power extraction performance of a semi-active flapping ...
Lu Dong +3 more
doaj +1 more source
Airfoil design via cubic splines - Ferguson's curves revisited [PDF]
, 2007 Few aerospace design topics have had so many pages devoted to them as airfoil parameterization. Claims of novelty must therefore be made with caution in this area, so we declare our starting point simply as a fresh perspective on legacy techniques ...
Andy Keane +3 more
core +2 more sources
Effect of Tailing-Edge Thickness on Aerodynamic Noise for Wind Turbine Airfoil
Energies, 2019 The influence of wind turbine airfoil trailing edge thickness on aerodynamics and aerodynamic noise characteristics was studied using the computational fluid dynamics (CFD)/ Ffowcs Williams–Hawkings (FW–H) method in the present work.
Xinkai Li +4 more
doaj +1 more source
Applied Sciences, 2020 The dynamic stall characteristics of rotor airfoil are researched by employing unsteady Reynolds-Averaged Navier-Stokes (RANS) method under oscillating freestream velocity conditions.
Qing Wang, Qijun Zhao
doaj +1 more source
Machines, 2022 Generating a high startup torque is a critical factor for the application of small wind turbines in regions with low wind speed. In the present study, the blades of a small wind turbine were designed and optimized to maximize the output power and startup
Vahid Akbari +4 more
doaj +1 more source
Numerical Simulation of Flapping Airfoil Aerodynamic Characteristics
Applied SciencesFlapping 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 +3 more
doaj +1 more source
Zhongguo Jianchuan Yanjiu, 2023 Objective This paper aims to study the effects of the freezing phenomenon of supercooled water droplets in intake air on the aerodynamic performance of a marine power intake system under cold marine environment conditions.
Lei PENG +3 more
doaj +1 more source
Effect of Using Bumps on Wings Aerodynamic Characteristics at Low Reynolds Numbers [PDF]
Engineering and Technology Journal, 2010 The effect of using bumps on the aerodynamic characteristics of airfoil at low Reynolds numbers is presented in this research. A theoretical study was done on the (NACA 4418) airfoil consist of bumps that have radius (2% c) on the upperand lower surfaces
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Energy Science &Engineering, EarlyView.Turbulence intensity from 1% to 25% was parametrically tested on a three‐bladed H‐type Darrieus rotor across five tip speed ratios (TSRs) using two‐dimensional URANS. The optimal TSR proved the most efficient and most robust operating point simultaneously, with Cp losses capped at 5.8% even at TI = 25%. ABSTRACT The effect of inlet turbulence intensity
Aydin Ulus
wiley +1 more source
FluidsIn aerospace, flow control techniques have improved the separation flow characteristics around airfoils by various means. In this paper, the delayed detached eddy simulation (DDES) technique is used to simulate the detailed flow field around the NACA0021
Zelin Liu, Kaidi Li, Xiaojing Sun
doaj +1 more source