The current focus on renewable energy is driving installation of a growing number wind turbines. In recent years, efforts to improve power generation efficiency by using larger turbine blades have resulted in higher blade tip speeds. glass fiber reinforced plastic (GFRP) used for surfaces subject wear due particle impingement from wind, rain, and dust during long-term operation. As the mechanic...

Leading edge erosion (LEE) repairs of wind turbine blades (WTBs) involve infield application leading protection (LEP) solutions. The industry is currently aiming to use factory based LEP coatings that can applied the WTBs before they are shipped out for installation. However, one main challenges related these solutions choice a minimum length be in spanwise direction WTBs. Generally, coating su...

Soil loss from dryland farms on the Columbia Plateau in Oregon and Washington (USA) results primarily from rain falling on frozen, cultivated soil. Soils are most susceptible to erosion when moldboard plowed, summer-fallowed, repeatedly rodweeded or cultivated, and fall planted to winter-wheat. These tillage practices are used because they help control weed and disease infestations and consiste...

Leading edge erosion on a wind turbine blade from Vindeby offshore farm is characterized by X-ray tomography, and air bubbles within the top coat are observed. Similar coating systems with almost without tested R&D Test Systems style whirling arm rain tester (RET) found to have different V–N curves. In general, slope of two curves was comparable. However, absolute performance value RET differs ...

The rain-induced fatigue damage in the wind turbine blade coating has attracted increasing attention owing to significant repair and maintenance costs. present paper develops an improved computational framework for analyzing induced by rain erosion. first presents extended stochastic field simulation model that considers different raindrop shapes (spherical, flat, spindle), sizes, impact angles...

In order to improve the erosion capacity of a supercritical carbon dioxide (SC-CO2) jet, the influence of a nano-silica additive on the rock erosion characteristics was experimentally investigated. By impinging the SC-CO2 jets with nano-silica mass fractions of 0 wt % (pure SC-CO2 jet), 3 wt %, 6 wt %, 9 wt %, 12 wt %, 15 wt %, and 18 wt % on specimens of red sandstone, the erosion volumes unde...

The capacity of an advection/diffusion model to predict sand transport under varying wave and current conditions is evaluated. The horizontal sand transport rate is computed by vertical integration of the suspended sediment flux. A correction procedure for the near-bed concentration is proposed so that model results are independent of the vertical resolution. The method can thus be implemented ...