Ducted turbine theory with right angled ducts

The Science of Making Torque from Wind 2014

McLaren-Gow, S.^1 ; Jamieson, P.^1 ; Graham, J.M.R.^2

Wind Energy Systems Centre for Doctoral Training, University of Strathclyde, 204 George Street, Glasgow, G1 1XW, United Kingdom^1

Department of Aeronautics, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom^2

关键词: Ducted turbines;    Exit angles;    Inviscid flows;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012083/pdf
DOI  :  10.1088/1742-6596/524/1/012083

来源: IOP

【 摘 要 】

This paper describes the use of an inviscid approach to model a ducted turbine-also known as a diffuser augmented turbine-and a comparison of results with a particular one-dimensional theory. The aim of the investigation was to gain a better understanding of the relationship between a real duct and the ideal diffuser, which is a concept that is developed in the theory. A range of right angled ducts, which have a rim for a 90° exit angle, were modelled. As a result, the performance of right angled ducts has been characterised in inviscid flow. It was concluded that right angled ducts cannot match the performance of their associated ideal diffuser and that the optimum rotor loading for these turbines varies with the duct dimensions.