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Parametric study on the design of baffle for three-dimensional turning diffuser

Secondary flow developed in the inner wall region within a turning diffuser will reduce its performance particularly in terms of both pressure recovery (Cp) and flow uniformity (au). Introduction of baffle is effective in reducing separated flow in turning diffuser, hence enhance its performance. Th...

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Main Author: Noh @ Seth, Nur Hazirah
Format: Thesis
Language:English
English
English
Published: 2016
Subjects:
TL Motor vehicles. Aeronautics. Astronautics
TL500-777 Aeronautics. Aeronautical engineering
Online Access:http://eprints.uthm.edu.my/10039/2/24p%20NUR%20HAZIRAH%20NOH%20%40%20SETH.pdf
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http://eprints.uthm.edu.my/10039/3/NUR%20HAZIRAH%20NOH%20%40%20SETH%20WATERMARK.pdf
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spelling my.uthm.eprints.100392023-10-01T02:07:42Z http://eprints.uthm.edu.my/10039/ Parametric study on the design of baffle for three-dimensional turning diffuser Noh @ Seth, Nur Hazirah TL Motor vehicles. Aeronautics. Astronautics TL500-777 Aeronautics. Aeronautical engineering Secondary flow developed in the inner wall region within a turning diffuser will reduce its performance particularly in terms of both pressure recovery (Cp) and flow uniformity (au). Introduction of baffle is effective in reducing separated flow in turning diffuser, hence enhance its performance. Therefore, flow structure in three­dimensional turning diffuser with baffle was studied and the subsequent impacts towards turning diffuser performance was observed. A parametric study was also conducted on the preliminary design of airfoil in determining the most optimum baffle design that is to be located inside the same turning diffuser. An experiment was conducted with inflow Reynolds number (Re;n) that was varied between 4.527E+04 and l .263E+05. As measured by using pressure tapping that was connected to a digital Manometer, a pressure recovery of Cp=0.341 was obtained when the system was operated at Reynolds number Re;n= l.263E+05. This result had shown an improvement ofup to 43% compared to the previous study that was carried out at the same Reynolds number but with pressure recovery Cp=0.194. Similarly, the flow uniformity which was measured by using Particle Image Velocimetry (PIV) had improved up to 33% at Re;11=9.950E+04 with a11=3.09 as compared to the previous study, where a11=4.64. A parametric study on the preliminary baffle design was also simulated using ANSYS Fluent, which had been verified and validated according to experimental data. The parametric study involved varying several parameters such as type of baffle, the angle of attack, AOA, thickness to chord ratio [tic(%)], camber to chord ratio [Ile (%)], and chord length [c (cm)]. Simulations of various 23 designs with combination of several parameter changes had discovered an optimum design of airfoil with AOA= l6°, tic = 7.658%, jlc = 7% and chord length, c = 5 cm. In comparison to the preliminary airfoil design, that optimum design for the three­dimensional turning diffuser had achieved 7.202% and 6.164% perfom1a.nce improvement in terms of flow uniformity and pressure recovery, respectively 2016-11 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/10039/2/24p%20NUR%20HAZIRAH%20NOH%20%40%20SETH.pdf text en http://eprints.uthm.edu.my/10039/1/NUR%20HAZIRAH%20NOH%20%40%20SETH%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/10039/3/NUR%20HAZIRAH%20NOH%20%40%20SETH%20WATERMARK.pdf Noh @ Seth, Nur Hazirah (2016) Parametric study on the design of baffle for three-dimensional turning diffuser. Doctoral thesis, Universiti Tun Hussein Onn Malaysia.
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
English
English
topic TL Motor vehicles. Aeronautics. Astronautics
TL500-777 Aeronautics. Aeronautical engineering
spellingShingle TL Motor vehicles. Aeronautics. Astronautics
TL500-777 Aeronautics. Aeronautical engineering
Noh @ Seth, Nur Hazirah
Parametric study on the design of baffle for three-dimensional turning diffuser
description Secondary flow developed in the inner wall region within a turning diffuser will reduce its performance particularly in terms of both pressure recovery (Cp) and flow uniformity (au). Introduction of baffle is effective in reducing separated flow in turning diffuser, hence enhance its performance. Therefore, flow structure in three­dimensional turning diffuser with baffle was studied and the subsequent impacts towards turning diffuser performance was observed. A parametric study was also conducted on the preliminary design of airfoil in determining the most optimum baffle design that is to be located inside the same turning diffuser. An experiment was conducted with inflow Reynolds number (Re;n) that was varied between 4.527E+04 and l .263E+05. As measured by using pressure tapping that was connected to a digital Manometer, a pressure recovery of Cp=0.341 was obtained when the system was operated at Reynolds number Re;n= l.263E+05. This result had shown an improvement ofup to 43% compared to the previous study that was carried out at the same Reynolds number but with pressure recovery Cp=0.194. Similarly, the flow uniformity which was measured by using Particle Image Velocimetry (PIV) had improved up to 33% at Re;11=9.950E+04 with a11=3.09 as compared to the previous study, where a11=4.64. A parametric study on the preliminary baffle design was also simulated using ANSYS Fluent, which had been verified and validated according to experimental data. The parametric study involved varying several parameters such as type of baffle, the angle of attack, AOA, thickness to chord ratio [tic(%)], camber to chord ratio [Ile (%)], and chord length [c (cm)]. Simulations of various 23 designs with combination of several parameter changes had discovered an optimum design of airfoil with AOA= l6°, tic = 7.658%, jlc = 7% and chord length, c = 5 cm. In comparison to the preliminary airfoil design, that optimum design for the three­dimensional turning diffuser had achieved 7.202% and 6.164% perfom1a.nce improvement in terms of flow uniformity and pressure recovery, respectively
format Thesis
author Noh @ Seth, Nur Hazirah
author_facet Noh @ Seth, Nur Hazirah
author_sort Noh @ Seth, Nur Hazirah
title Parametric study on the design of baffle for three-dimensional turning diffuser
title_short Parametric study on the design of baffle for three-dimensional turning diffuser
title_full Parametric study on the design of baffle for three-dimensional turning diffuser
title_fullStr Parametric study on the design of baffle for three-dimensional turning diffuser
title_full_unstemmed Parametric study on the design of baffle for three-dimensional turning diffuser
title_sort parametric study on the design of baffle for three-dimensional turning diffuser
publishDate 2016
url http://eprints.uthm.edu.my/10039/2/24p%20NUR%20HAZIRAH%20NOH%20%40%20SETH.pdf
http://eprints.uthm.edu.my/10039/1/NUR%20HAZIRAH%20NOH%20%40%20SETH%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/10039/3/NUR%20HAZIRAH%20NOH%20%40%20SETH%20WATERMARK.pdf
http://eprints.uthm.edu.my/10039/
_version_ 1779440612371595264
score 13.211869

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