Interaction of Atmospheric Turbulence with Blade Boundary Layer Dynamics on a 5MW Wind Turbine using Blade-boundary-layer-resolved CFD with hybrid URANS-LES

Effects of inflow turbulence on structural response of wind turbine blades

“…In their study, the near-blade velocities were measured using pitot probes at blade leading-edge and trailing-edge positions of a GE 1.5 MW wind turbine under natural environments. The same three response time scales as those reported in Vijayakumar et al [21] were experimentally identified. However, no direct measurements of blade loading and strain were obtained to link such turbulent inflow signatures with blade structural response.…”

“…Following this work, Churchfield et al [13] from the same group showed that the flapwise blade root bending moment and low-speed shaft torque are well-correlated with the incoming wind with a time offset matching the advection time of the flow from the inflow sampling location to the turbine rotor plane. The same turbine was simulated by Vijayakumar et al [21] via a hybrid URANS-LES scheme and an actuator line model (ALM). Temporal variation in blade loading was found to be associated with three distinct time scales, corresponding to the advection of atmospheric flow structures through the rotor, rotor rotation and turbulence-induced forcing as the blades traverse internal atmospheric flow structures.…”

Non-steady wind turbine response to daytime atmospheric turbulence

“…The interactions of the rotating wind turbine blades with the energy-dominant ABL turbulence eddies cause temporal and spatial variations in the blade boundary layer structure [2]. In particular, the passage of coherent energetic turbulence eddies through the rotor disc lead to large time variations in local surface stresses on the turbine blades.…”

The Study on Re Effect Correction for Laminar Wing with High Lift

“…However, in some other similar works, even very recent studies, concerning on the Computational Fluid Dynamics (CFD) investigation of a fluid flow, they have employed other turbulence model such as the RNG-k-ε [15], standard k-ε model [16], bybrid URANS-LES [17]. Figure 6.…”