CFD analysis of a straight bladed vertical axis wind turbine with selected transition and turbulence models /
At present, interests for developing wind turbines are rising due to the high demand in green energies production. The advantages of Straight-bladed Vertical Axis Wind Tur- bine (SB-VAWT) over any usual Horizontal Axis Wind Turbine (HAWT), is mainly due to its simple blade design and its insensitivi...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
Kuala Lumpur :
Kulliyyah of Engineering, International Islamic University Malaysia,
2018
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| Subjects: | |
| Online Access: | http://studentrepo.iium.edu.my/handle/123456789/4395 |
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| LEADER | 037670000a22002890004500 | ||
|---|---|---|---|
| 008 | 191008s2018 my a f m 000 0 eng d | ||
| 040 | |a UIAM |b eng |e rda | ||
| 041 | |a eng | ||
| 043 | |a a-my--- | ||
| 100 | 0 | |a Nur Farah Aqilah binti Mohamed Zaki, |e author | |
| 245 | 1 | 0 | |a CFD analysis of a straight bladed vertical axis wind turbine with selected transition and turbulence models / |c by Nur Farah Aqilah binti Mohamed Zaki |
| 264 | 1 | |a Kuala Lumpur : |b Kulliyyah of Engineering, International Islamic University Malaysia, |c 2018 | |
| 300 | |a xv, 105 leaves : |b colour illustrations ; |c 30cm. | ||
| 336 | |2 rdacontent |a text | ||
| 347 | |2 rdaft |a text file |b PDF | ||
| 502 | |a Thesis (MSME)--International Islamic University Malaysia, 2018. | ||
| 504 | |a Includes bibliographical references (leaves 65-73). | ||
| 520 | |a At present, interests for developing wind turbines are rising due to the high demand in green energies production. The advantages of Straight-bladed Vertical Axis Wind Tur- bine (SB-VAWT) over any usual Horizontal Axis Wind Turbine (HAWT), is mainly due to its simple blade design and its insensitivity to incoming wind directions. SB-VAWT have shown to be potentionally suited the urban area due to its small built and easy to manufacture blades, along with helping in reducing air pollution concentration from ur- banization. As SB-VAWT were developed specifically for city area, a low wind speed environment is expected. Many researchers resort in carrying out performance analysis using the Computational Fluid Dynamic (CFD) analysis as a means to investigate the working of SB-VAWT in such circumstances. The purpose of this thesis is to perform CFD analysis on a small-scaled SB-VAWT using two classes of transition turbulence model namely, the Local Correlation-based Transition Model (LCTM) and the Laminar Kinetic Energy (LKE) transitional model. The CFD analysis has been performed using the Unsteady Reynolds Averaged Navier-Stokes (URANS) simulation in foam-extend software which is a fork of OpenFOAM in order to take into account the unsteady ef- fects of transitional region. Then, a time-consuming and high computational demand, three-dimensional analysis is carried out using the performing transitional turbulence model alongside with the commonly used, k- ω SST model. Despite the limited com- putational resources experienced, various ways to tackle the problem is considered. In 3D analyses, a scaled-down SB-VAWT model is used in order to reduce simulation time and avoiding the need to generate enormous number of cells. Power coefficient, CP re- sulting from the simulations are then validated against the experimental study done by researchers in a wind tunnel. It is concluded in this thesis that the application of tran- sitional turbulence model show a more conforming result with the experimental data regardless of 2D and 3D CFD analysis. Especially the LCTM, γ-Reθ, SST model shows a stable application that can be seen from the blade torque reading throughout the revolutions. Vortices visualization in 2D also show that, strong ripples at the down- stream domain is avoided when applying the LCTM. | ||
| 596 | |a 1 | ||
| 655 | 7 | |a Theses, IIUM local | |
| 690 | |a Dissertations, Academic |x Department of Mechanical Engineering |z IIUM | ||
| 710 | 2 | |a International Islamic University Malaysia. |b Department of Mechanical Engineering | |
| 856 | 4 | |u http://studentrepo.iium.edu.my/handle/123456789/4395 | |
| 900 | |a sbh to aaz | ||
| 999 | |c 440406 |d 471176 | ||
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