Nacelle Modelling Introduction

The nacelle cover houses the drive train, gearbox, generator and brake assembly to protect the machinery from the environment. Bladed can simulate the aerodynamic loading on the nacelle and can also include the mass and inertia of the internal machinery and the nacelle cover. Click the Nacelle icon on the toolbar to define the nacelle characteristics.

Nacelle Wind Aerodynamic Load

In Bladed, the a wind turbine nacelle is simulated as a rectangular 3D box that attracts wind loading. The user may include wind loading on the nacelle due to aerodynamic drag. Select the Geometry checkbox to define the geometry and aerodynamic drag coefficient for the nacelle. The nacelle drag load is then computed based on the projected nacelle area perpendicular to the wind direction.

Mass and Inertia Properties

The mass and inertia properties may be input by the user. The mass and centre of mass location must represent the combined mass of the drive train (shafts, bearings, gearbox) and the nacelle. This mass must exclude the hub mass that is defined in the rotor modelling inputs. The inertia term should include only the static components of the drive train and nacelle and exclude rotational components such as the low-speed and high-speed shafts and generator inertia as these are accounted for in the drive train transmission inputs.

Last updated 28-08-2024