Analysis of leading edge erosion effects on turbulent flow over airfoils
نویسندگان
چکیده
The surface of wind turbine blades are prone to degradation due exposure the elements. Rain, hail, insects among many causes blade or erosion. Surface leads a reduction in aerodynamic performance, resulting power losses. effect is studied by modeling as rough surface. roughness can be positive (insects other foreign objects) negative (erosion, delamination). individual elements however very small and it not always feasible study actual degraded Thus various models have been proposed literature which eliminate need accurately model representing erosion with virtual on flow quantities near eroded In this study, performance airfoils leading edge quantified. Different investigated evaluated against theoretical models. Additionally, different integral boundary layer like displacement thickness, momentum thickness skin friction presented.
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15 صفحه اولLeading Edge Vortex Development on Pitching and Surging Airfoils: A Study of Vertical Axis Wind Turbines
Vertical axis wind turbine blades undergo dynamic stall due to the large 1 angle of attack variation they experience during a turbine rotation. Particle image 2 velocimetry on a pitching and surging airfoil was used to perform time resolved 3 measurements at blade Reynolds numbers near turbine operating conditions of 105. 4 These experiments were compared to simulations performed in the rotatin...
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ژورنال
عنوان ژورنال: Renewable Energy
سال: 2021
ISSN: ['0960-1481', '1879-0682']
DOI: https://doi.org/10.1016/j.renene.2021.03.021