Investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles

Turning diffuser is an engineering device that is widely used in the industry to reduce the flow velocity as well as change the direction of the flow. Having a curvature shape causes its performance to decrease in terms of pressure recovery (Cp) and flow uniformity (σu). Therefore, this study presen...

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Main Authors: Noh@Seth, Nur Hazirah, Nordin, Normayati, Othman, Safiah, Raghavan, Vijay R.
Format: Article
Language:English
Published: Trans Tech Publications 2014
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Online Access:http://eprints.uthm.edu.my/5285/1/AJ%202017%20%28368%29%20Investigation%20of%20flow%20uniformity.pdf
http://eprints.uthm.edu.my/5285/
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Institution: Universiti Tun Hussein Onn Malaysia
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spelling my.uthm.eprints.52852022-01-09T02:11:24Z http://eprints.uthm.edu.my/5285/ Investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles Noh@Seth, Nur Hazirah Nordin, Normayati Othman, Safiah Raghavan, Vijay R. TJ Mechanical engineering and machinery TK7800-8360 Electronics Turning diffuser is an engineering device that is widely used in the industry to reduce the flow velocity as well as change the direction of the flow. Having a curvature shape causes its performance to decrease in terms of pressure recovery (Cp) and flow uniformity (σu). Therefore, this study presents the work done in designing baffles to be installed in the turning diffuser with ratio of AR=2.16 to improve the flow uniformity and pressure recovery. It also aims to investigate the mechanism of flow structure and pressure recovery in turning diffusers by means of turning baffles. The results with varying inflow Reynolds number (Rein) between 5.786E+04 – 1.775E+05 have been experimentally tested and compared with previous study. Particle image velocimetry (PIV) was used to determine the flow uniformity. On the other hand, a digital manometer provided the average static pressure of the inlet and outlet of turning diffuser. The best produced pressure recovery of Cp=0.526 were recorded when the system were operated at the highest Reynolds number tested Rein=1.775E+05. This result shows an improvement up to 54.625% deviation from previous study with Cp=0.239. The flow uniformity also shows an improvement of 47.127% deviation from previous study at the same Rein with σu=3.235 as compared to previous study σu=6.12. Trans Tech Publications 2014 Article PeerReviewed text en http://eprints.uthm.edu.my/5285/1/AJ%202017%20%28368%29%20Investigation%20of%20flow%20uniformity.pdf Noh@Seth, Nur Hazirah and Nordin, Normayati and Othman, Safiah and Raghavan, Vijay R. (2014) Investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles. Applied Mechanics and Materials, 465-. pp. 526-530. ISSN 1660-9336
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
topic TJ Mechanical engineering and machinery
TK7800-8360 Electronics
spellingShingle TJ Mechanical engineering and machinery
TK7800-8360 Electronics
Noh@Seth, Nur Hazirah
Nordin, Normayati
Othman, Safiah
Raghavan, Vijay R.
Investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles
description Turning diffuser is an engineering device that is widely used in the industry to reduce the flow velocity as well as change the direction of the flow. Having a curvature shape causes its performance to decrease in terms of pressure recovery (Cp) and flow uniformity (σu). Therefore, this study presents the work done in designing baffles to be installed in the turning diffuser with ratio of AR=2.16 to improve the flow uniformity and pressure recovery. It also aims to investigate the mechanism of flow structure and pressure recovery in turning diffusers by means of turning baffles. The results with varying inflow Reynolds number (Rein) between 5.786E+04 – 1.775E+05 have been experimentally tested and compared with previous study. Particle image velocimetry (PIV) was used to determine the flow uniformity. On the other hand, a digital manometer provided the average static pressure of the inlet and outlet of turning diffuser. The best produced pressure recovery of Cp=0.526 were recorded when the system were operated at the highest Reynolds number tested Rein=1.775E+05. This result shows an improvement up to 54.625% deviation from previous study with Cp=0.239. The flow uniformity also shows an improvement of 47.127% deviation from previous study at the same Rein with σu=3.235 as compared to previous study σu=6.12.
format Article
author Noh@Seth, Nur Hazirah
Nordin, Normayati
Othman, Safiah
Raghavan, Vijay R.
author_facet Noh@Seth, Nur Hazirah
Nordin, Normayati
Othman, Safiah
Raghavan, Vijay R.
author_sort Noh@Seth, Nur Hazirah
title Investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles
title_short Investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles
title_full Investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles
title_fullStr Investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles
title_full_unstemmed Investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles
title_sort investigation of flow uniformity and pressure recovery in a turning diffuser by means of baffles
publisher Trans Tech Publications
publishDate 2014
url http://eprints.uthm.edu.my/5285/1/AJ%202017%20%28368%29%20Investigation%20of%20flow%20uniformity.pdf
http://eprints.uthm.edu.my/5285/
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