Experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes

Savonius turbines are drag-based rotors which operate due to a pressure difference between the advancing and retreating blades. After going through an exhaustive literature review, it was realized that the Savonius wind turbines are an applicable option at low wind speed areas, where the counterpart...

Full description

Saved in:

Bibliographic Details
Main Author:	Abdul Ridha, Salih Meri
Format:	Thesis
Language:	English English English
Published:	2019
Subjects:	TJ807-830 Renewable energy sources
Online Access:	http://eprints.uthm.edu.my/121/1/24p%20SALIH%20MERI%20ABDUL%20RIDHA.pdf http://eprints.uthm.edu.my/121/2/SALIH%20MERI%20ABDUL%20RIDHA%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/121/3/SALIH%20MERI%20ABDUL%20RIDHA%20WATERMARK.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-uthm-ep.121
record_format	uketd_dc
spelling	my-uthm-ep.1212021-06-22T07:56:58Z Experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes 2019-11 Abdul Ridha, Salih Meri TJ807-830 Renewable energy sources Savonius turbines are drag-based rotors which operate due to a pressure difference between the advancing and retreating blades. After going through an exhaustive literature review, it was realized that the Savonius wind turbines are an applicable option at low wind speed areas, where the counterpart of these turbines cannot work efficiently. Nevertheless, the existing design is still under research to make it more applicable in urban areas. Therefore, the research objective was to develop and test an elliptical Savonius wind turbine to improving its performance in terms of power and torque coefficients by modifying blade shapes and overlap ratio. In the beginning, a series of 2D unsteady simulations (CFD-Fluent version 19.1) of the Savonius elliptical turbine has been performed to study the overlap ratio of blades and the effect of the turbulence models. Conventional elliptical Savonius turbine was modified by changing the overlap ratio from the value (OR=0.15) to (OR=0.2) and called as the Model-A. Then, the concave surface of the blade Model-A was modified (as zigzag shape) and called as Model-B. The blade shape of the Model-B was modified by adding bypass channels for each blade to creating new configuration was called the Model-C. The experimental work begins with the manufacturing of the models (A, B and C) of the blade using 3D printing technology. Models were tested by the wind tunnel in Aerodynamic laboratory (UTHM) with four cases of wind velocity. 2D simulation result for Model-A at OR= 0.2, where the increase in maximum power coefficient value obtained was 3.85% and 7.69% compared to overlap ratio (0.15 and 0.1), respectively. The result of the experimental test was obtained the maximum power coefficient (0.296, 0.292, 0.291, and 0.295) at wind velocity (6 m/s, 8 m/s, 9 m/s, and 10 m/s), respectively for Model-B. The Model-C result in the maximum power coefficient (0.28) compared with Model-A (0.26). The 3D unsteady simulation also has been done to visualisation the behaviour of flow around Model-B and it show a good agreement with experimental test results. 2019-11 Thesis http://eprints.uthm.edu.my/121/ http://eprints.uthm.edu.my/121/1/24p%20SALIH%20MERI%20ABDUL%20RIDHA.pdf text en public http://eprints.uthm.edu.my/121/2/SALIH%20MERI%20ABDUL%20RIDHA%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/121/3/SALIH%20MERI%20ABDUL%20RIDHA%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Mekanikal dan Pembuatan
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TJ807-830 Renewable energy sources
spellingShingle	TJ807-830 Renewable energy sources Abdul Ridha, Salih Meri Experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes
description	Savonius turbines are drag-based rotors which operate due to a pressure difference between the advancing and retreating blades. After going through an exhaustive literature review, it was realized that the Savonius wind turbines are an applicable option at low wind speed areas, where the counterpart of these turbines cannot work efficiently. Nevertheless, the existing design is still under research to make it more applicable in urban areas. Therefore, the research objective was to develop and test an elliptical Savonius wind turbine to improving its performance in terms of power and torque coefficients by modifying blade shapes and overlap ratio. In the beginning, a series of 2D unsteady simulations (CFD-Fluent version 19.1) of the Savonius elliptical turbine has been performed to study the overlap ratio of blades and the effect of the turbulence models. Conventional elliptical Savonius turbine was modified by changing the overlap ratio from the value (OR=0.15) to (OR=0.2) and called as the Model-A. Then, the concave surface of the blade Model-A was modified (as zigzag shape) and called as Model-B. The blade shape of the Model-B was modified by adding bypass channels for each blade to creating new configuration was called the Model-C. The experimental work begins with the manufacturing of the models (A, B and C) of the blade using 3D printing technology. Models were tested by the wind tunnel in Aerodynamic laboratory (UTHM) with four cases of wind velocity. 2D simulation result for Model-A at OR= 0.2, where the increase in maximum power coefficient value obtained was 3.85% and 7.69% compared to overlap ratio (0.15 and 0.1), respectively. The result of the experimental test was obtained the maximum power coefficient (0.296, 0.292, 0.291, and 0.295) at wind velocity (6 m/s, 8 m/s, 9 m/s, and 10 m/s), respectively for Model-B. The Model-C result in the maximum power coefficient (0.28) compared with Model-A (0.26). The 3D unsteady simulation also has been done to visualisation the behaviour of flow around Model-B and it show a good agreement with experimental test results.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Abdul Ridha, Salih Meri
author_facet	Abdul Ridha, Salih Meri
author_sort	Abdul Ridha, Salih Meri
title	Experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes
title_short	Experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes
title_full	Experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes
title_fullStr	Experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes
title_full_unstemmed	Experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes
title_sort	experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Mekanikal dan Pembuatan
publishDate	2019
url	http://eprints.uthm.edu.my/121/1/24p%20SALIH%20MERI%20ABDUL%20RIDHA.pdf http://eprints.uthm.edu.my/121/2/SALIH%20MERI%20ABDUL%20RIDHA%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/121/3/SALIH%20MERI%20ABDUL%20RIDHA%20WATERMARK.pdf
_version_	1747830534185156608

Experimental and simulation analysis for performance enhancement of elliptical savonius wind turbine by modifying blade shapes

Similar Items