Small wind turbine augmentation: Experimental investigations of shrouded- and twin-rotor wind turbine systems
Article dans une revue avec comité de lecture
Author
Abstract
An increase in the efficiency of Small Wind Turbines (SWTs) by aerodynamic optimisation of the blade geometry is limited (low Reynolds number influence). Solutions such as the Diffuser-Augmented Wind Turbine (DAWT) and the twin-rotor systems are of increasing interest. A diffuser promotes an increase in the wind mass flow rate through the turbine, whereas an auxiliary rotor enables extraction of the wind kinetic energy in the wake. The paper summarizes the measurements of wind turbine systems performance conducted at the Institute of Turbomachinery, Lodz University of Technology (IMP TUL). The research incorporated a spectrum of wind turbine configurations for open and shrouded, single- and twin-rotor systems. The objective was to compare the performance of the same rotor in different configurations. The influence of a low Reynolds number flow on the rotor performance is also discussed and quantified. The study shows that, while augmenting the wind turbine performance (as much as twofold increase), shrouding rises significantly the rotor loading. A remedy for that may be an application of the second rotor. Although it provides a rather modest efficiency increase (11–13% for the unshrouded-, 4–5% for shrouded turbine), it allows loads to be distributed more evenly on turbines.
Files in this item
- Name:
- DYNFLUID_E_2019_DOBREV.pdf
- Size:
- 4.989Mb
- Format:
- Description:
- Article
- Embargoed until:
- 2020-05-01
Collections
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureCOGNET, Vincent; COURRECH DU PONT, Sylvain; DOBREV, Ivan; MASSOUH, Fawaz; THIRIA, Benjamin (Royal Society, The, 2017)Wind energy is becoming a significant alternative solution for future energy production. Modern turbines now benefit from engineering expertise, and a large variety of different models exists, depending on the context and ...
-
Article dans une revue avec comité de lectureNOURA, Belhadj; DOBREV, Ivan; KERFAH, R.; MASSOUH, Fawaz; KHELLADI, Sofiane (2016)The wake and the lack of existing velocity behind the wind turbine affect the energy production and the mechanical integrity of wind turbines downstream in the wind farms. This paper presents an investigation of the unsteady ...
-
Communication avec acteDOBREV, Ivan; MASSOUH, Fawaz (BULTRANS -2014 Proceedings, 2014)The paper presents a study of aerodynamic characteristics of a car, which has the simplified geometric shape, so called Ahmed body. Flow around the body and the influence of its rear slant angle on drag are widely studied ...
-
Communication avec acteVELKOVA, Cvetelina; DOBREV, Ivan; TODOROV, Michael; MASSOUH, Fawaz (BulTrans-2012, 2012)The aim of the computational study is to present different approach for numerical modeling of airfoil dynamic stall as the airfoil is pitched at a constant rate from zero incidences to a high angle of attack. An application ...
-
Article dans une revue avec comité de lectureMEGHLAOUI, Issam; DOBREV, Ivan; MASSOUH, Fawaz; BENRETEM, A. Ouahab; KHALFA, Dalila (Begell House, 2017)This work aims to develop a free wake model, allowing quick simulation of flow through a horizontal axis wind turbine. The rapidity of computation is particularly interesting when this aerodynamic model is integrated with ...