A Comparative Analysis on the Response of a Wind-Turbine Model to Atmospheric and Terrain Effects

摘要: In a series of wind-tunnel experiments conducted at the St. Anthony Falls Laboratory, wind-turbine model was exposed to three different thermal regimes (neutral, weakly stable and convective flows) in simple arrangements relevant wind-farm applications: single turbine boundary-layer, aligned turbine-turbine, an upwind three-dimensional sinusoidal hill with turbine. Results focus on spatial evolution large-scale motions developing over topographic boundary conditions, their influence mean fluctuating angular velocity rotor. As compared case, both caused reduction regardless regime; fluctuations always decreased upwind, which depleted energy large structures flow; however such (increased) under stably stratified (convective) conditions when present. Pre-multiplied spectra rotor two-point correlation contours streamwise component confirmed non-trivial link between stratification terrain complexity. It is inferred that effects occurring boundary-layer modulate spanwise motion wake define whether shelters or exposes enhanced energetic motions.