Wind Tunnel Hotwire Measurements, Flow Visualization and Thrust Measurement of a VAWT in Skew

Author:

Simão Ferreira Carlos J.1,van Bussel Gerard J. W.1,van Kuik Gijs A. M.1

Affiliation:

1. DUWIND — Delft University Wind Energy Research Institute, Faculty of Aerospace Engineering, Kluyverweg 1, 2629 HS, Delft, The Netherlands

Abstract

The results of experimental research on the wake and induced flow around a vertical axis wind turbine (VAWT) in skew are presented. The previous research on VAWTs in skew is limited because this operation mode has only recently been found to be significant in the operation of VAWTs in the built environment. These results contain hotwire measurements of the incoming flow and wake of a VAWT in nonskewed and skewed flow. The high sampling rate of the hotwire data allows the effects of blade passing to be identified. Flow visualization of the tip vortices is also presented. Thrust measurements of the rotor were performed to understand the effect of skew on thrust variation and to compare with analytical predictions.

Publisher

ASME International

Subject

Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment

Reference8 articles.

1. Performance of a H-Darrieus in the Skewed Flow on a Roof;Mertens;Sol. Energy

2. An Analytical Method to Predict the Variation in Performance of an H-Darrieus in Skewed Flow and its Experimental Validation;Ferreira

3. Timmer, W., Vermeer, L., and van Veen, J., 2002, “Wind Tunnel Measurements on a One-Bladed Rotor in the Framework of the Stabtool Project,” Tech. Report, TUDelft - DUWIND.

4. Toet, S., and Vermeer, N., 1991, “Modificaties Blaaspijp Instituut voor Windenergie en Beschrijving Huidige Situatie,” Tech. Report IW-91049M, TU Delft, Faculteit der Civiele Techniek, Institut voor Windenergie, The Netherlands.

5. Measurement and Modelling of Tip Vortex Paths in the Wake of a HAWT Under Yawed Flow Conditions;Haans

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