||The Performance Assessment of Wave and Tidal Array Systems (PerAWaT) project, launched in October 2009 with £8m of ETI investment. The project delivered validated, commercial software tools capable of significantly reducing the levels of uncertainty associated with predicting the energy yield of major wave and tidal stream energy arrays. It also produced information that will help reduce commercial risk of future large scale wave and tidal array developments.
This document describes the scale model experiments required to investigate the performance and the wake of a scale model rotor in order to inform the development and validate numerical models used to predict the performance of a tidal turbine. Section 2 presents the requirements of this work package. The following sections include details of the scaling rationale, the experimental equipment and facilities, and theproposed testing programme. Information regarding the sub-contract to be in place to construct models is also provided.
The purpose of the scale model experiments described here is to investigate, through physical testing of a single device :
The experimental data will contribute to the development of numerical models within the project. They will help calibrate and validate WG3 WP1 (CFD numerical model Ansys Fluent). They will also provide information to WG3 WP4 (GH engineering tool) and WG3 WP5 (CFD numerical model Code_Saturne) and will increase the level of confidence of the models developed in these work packages.
- the detailed hydrodynamic performance of rotors in turbulent flows,
- the effect of bounding surfaces on the device performance, and
- the wake form and structures downstream of a tidal device, as a function of flow profile, depth and ambient turbulence.