NDLI: Numerical Investigations on the Use of Multi-Element Airfoils for Vertical Axis Wind Turbine Configurations

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Elhadji, A. A. Bah Lakshmi, N. Sankar Jechiel, I. Jagoda
Copyright Year	2013
Abstract	Vertical axis wind turbines (VAWT) have a relatively simple, rugged construction compared to HAWTs. However, vertical-axis wind turbines have numerous challenges that may hinder their performance. For instance they are strongly affected by dynamic stall at low tip speed ratios. A significant part of the kinetic energy contained in the oncoming wind is lost in swirl and vortices. As a result, VAWTs have a lower power production and efficiency compared to HAWTs. In an effort to alleviate the adverse effects of dynamic stall phenomena, the present study explores the use of two-element airfoils. A comparative study of single element and dual element VAWT configurations for representative VAWT turbines is given. The benefits of dual-element configurations are analyzed through a detailed flow visualization study of the single and two-element VAWT configurations at various azimuthal locations for a representative tip speed ratio. Analysis of these qualitative phenomena is complemented by a discussion on quantitative data for torque, surface pressure distributions, and airloads.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791856161
DOI	10.1115/GTINDIA2013-3505
Conference Proceedings	ASME 2013 Gas Turbine India Conference
Language	English
Publisher Date	2013-12-05
Publisher Place	Bangalore, Karnataka, India
Access Restriction	Subscribed
Subject Keyword	Wind Construction Torque Vertical axis wind turbines Vortices Energy generation Flow visualization Airfoils Horizontal axis wind turbines Kinetic energy Pressure Turbines
Content Type	Text
Resource Type	Article

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