Offshore wind power has been in the spotlight among renewable energy sources. The current trends of increased ratings and longer blades come together with aim to reduce costs by design optimisation. standard approach deal uncertainties wind-turbine use characteristic values safety factors. This paper focusses on modelling effect structural aerodynamic blades. First, laminate properties are char...

This paper presents an experimental study on the unsteady pressure loading for two circular cylinders in tandem arrangement Reynolds number subcritical regime. Experiments were conducted heavily instrumented cylinders, each with multiple static and dynamic sensor devices positioned at various peripheral spanwise locations, enabling extensive surface pressure, coherence, turbulence length-scale ...

An experimental study was conducted to characterize the dynamic wind loads and evolution of the unsteady vortex and turbulent flow structures in the near wake of a horizontal axis wind turbine model placed in an atmospheric boundary layer wind tunnel. In addition to measuring dynamic wind loads (i.e., aerodynamic forces and bending moments) acting on the wind turbine model by using a high-sensi...

The safety and operational flight envelope of helicopters carrying externally slung loads, as illustrated in Figure 1, in support of regular Army/Special Air Service (SAS) operations, is limited and sometimes seriously hindered by stability and control problems. Several incidences have been reported by the Australian Army in which possible aerodynamic excitation or dynamic instability of the sl...

Abstract: This paper presents a combination of a computational structural dynamics (CSD) and high fidelity unsteady computational fluid dynamics (CFD) analysis. Regarding a helicopter in hover, aerodynamic loads are computed from the three-dimensional Navier-Stokes solver in overlapped grids, and blade motions are obtained from the geometrically exact rotor beam analysis. To couple those analys...

This paper describes a videogrammetric technique for determining aerodynamic loads based on optical elastic deformation measurements. The data reduction methods are developed to extract the normal force and pitching moment from beam deformation data. The axial force is obtained by measuring the axial translational motion of a movable shaft in a spring/bearing device. Proof-of-concept calibratio...