Turbulent Flow In An Active Wind-Driven Ventilation Device

Growing concern on environmental issues has prompted house owners and industries to consider use of roof top ventilators, as a passive form of quality air circulation and comfort using only wind energy. However, many of these ventilators have evolved through trial and error and the flow physics a...

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Main Author:	Abolfazl, Sousanabadi Farahani
Format:	Thesis
Language:	English English
Published:	2009
Subjects:	Turbulence Fluid dynamics
Online Access:	http://psasir.upm.edu.my/id/eprint/12259/1/FK_2009_88_.pdf
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id	my-upm-ir.12259
record_format	uketd_dc
spelling	my-upm-ir.122592024-07-10T06:27:24Z Turbulent Flow In An Active Wind-Driven Ventilation Device 2009-10 Abolfazl, Sousanabadi Farahani Growing concern on environmental issues has prompted house owners and industries to consider use of roof top ventilators, as a passive form of quality air circulation and comfort using only wind energy. However, many of these ventilators have evolved through trial and error and the flow physics associated with these ventilators is barely understood. This study presents prediction of airflow using Computational Fluid Dynamics (CFD) technique code, FLUENT, so as to visualize the flow behavior around and within turbine ventilator in addition to determining the aerodynamic forces acting on a turbine ventilator during operation and comparing the simulated results to available experimental data. The prototype used for this investigation is a wind driven ventilator from Edmonds Company with a rotor diameter of 330 mm and base diameter of 1 50 mm. The free stream velocities in visualization of flow are set to be 7 and 20 m.s-l when, for determining the aerodynamic forces are considered to be 7, 10, 14, 20 and 25 m.s-l corresponding to experiment. The simulated prototype is placed in a control volume with the same dimensions as open circuit wind tunnel used in experimental investigation. Also the operating pressure and fluid properties are set to be the same as experiment. Standard k-E, Realizable k-E, SST k-w and RSM turbulence models are used by taking advantage of moving mesh method to simulate the rotation of turbine ventilator and the consequent results are obtained through the sequential process which ensures accuracy of the computations. The results demonstrated that, the RSM turbulence model shows the best performance on flow visualization and predicting the aerodynamic forces acting on a turbine ventilator. Results from this study, besides ensuring the reliability of utilizing the CFD method in design process of future turbine ventilators, would lead us to a conspicuous progress on increasing the efficiency at reduced cost of wind driven ventilators and similar devices. Turbulence Fluid dynamics 2009-10 Thesis http://psasir.upm.edu.my/id/eprint/12259/ http://psasir.upm.edu.my/id/eprint/12259/1/FK_2009_88_.pdf text en public masters Universiti Putra Malaysia Turbulence Fluid dynamics Faculty of Engineering Adam, Nor Mariah English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Adam, Nor Mariah
topic	Turbulence Fluid dynamics
spellingShingle	Turbulence Fluid dynamics Abolfazl, Sousanabadi Farahani Turbulent Flow In An Active Wind-Driven Ventilation Device
description	Growing concern on environmental issues has prompted house owners and industries to consider use of roof top ventilators, as a passive form of quality air circulation and comfort using only wind energy. However, many of these ventilators have evolved through trial and error and the flow physics associated with these ventilators is barely understood. This study presents prediction of airflow using Computational Fluid Dynamics (CFD) technique code, FLUENT, so as to visualize the flow behavior around and within turbine ventilator in addition to determining the aerodynamic forces acting on a turbine ventilator during operation and comparing the simulated results to available experimental data. The prototype used for this investigation is a wind driven ventilator from Edmonds Company with a rotor diameter of 330 mm and base diameter of 1 50 mm. The free stream velocities in visualization of flow are set to be 7 and 20 m.s-l when, for determining the aerodynamic forces are considered to be 7, 10, 14, 20 and 25 m.s-l corresponding to experiment. The simulated prototype is placed in a control volume with the same dimensions as open circuit wind tunnel used in experimental investigation. Also the operating pressure and fluid properties are set to be the same as experiment. Standard k-E, Realizable k-E, SST k-w and RSM turbulence models are used by taking advantage of moving mesh method to simulate the rotation of turbine ventilator and the consequent results are obtained through the sequential process which ensures accuracy of the computations. The results demonstrated that, the RSM turbulence model shows the best performance on flow visualization and predicting the aerodynamic forces acting on a turbine ventilator. Results from this study, besides ensuring the reliability of utilizing the CFD method in design process of future turbine ventilators, would lead us to a conspicuous progress on increasing the efficiency at reduced cost of wind driven ventilators and similar devices.
format	Thesis
qualification_level	Master's degree
author	Abolfazl, Sousanabadi Farahani
author_facet	Abolfazl, Sousanabadi Farahani
author_sort	Abolfazl, Sousanabadi Farahani
title	Turbulent Flow In An Active Wind-Driven Ventilation Device
title_short	Turbulent Flow In An Active Wind-Driven Ventilation Device
title_full	Turbulent Flow In An Active Wind-Driven Ventilation Device
title_fullStr	Turbulent Flow In An Active Wind-Driven Ventilation Device
title_full_unstemmed	Turbulent Flow In An Active Wind-Driven Ventilation Device
title_sort	turbulent flow in an active wind-driven ventilation device
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Engineering
publishDate	2009
url	http://psasir.upm.edu.my/id/eprint/12259/1/FK_2009_88_.pdf
_version_	1804888705690763264

Turbulent Flow In An Active Wind-Driven Ventilation Device

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