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Statistical Description Of The Turbulent Round Jet Developing Region Along Its Centerline

Due to the technical measurement difficulties, analysis on the developing region of a turbulent round jet has been omitted despite its vast significance in explaining the establishment of the fully developed counterpart. With a self-developed novel and sophisticated laser Doppler system that can acc...

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Main Authors: Yaacob, Mohd Rusdy, Buchhave, Preben, Velte, Clara Marika
Format: Article
Language:English
Published: Penerbit Akademia Baru 2019
Online Access:http://eprints.utem.edu.my/id/eprint/24258/2/PUBLISHED%20VERSION%20DEC2019.PDF
http://eprints.utem.edu.my/id/eprint/24258/
http://www.akademiabaru.com/doc/ARFMTSV64_N2_P337_353.pdf
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spelling my.utem.eprints.242582020-07-30T16:17:48Z http://eprints.utem.edu.my/id/eprint/24258/ Statistical Description Of The Turbulent Round Jet Developing Region Along Its Centerline Yaacob, Mohd Rusdy Buchhave, Preben Velte, Clara Marika Due to the technical measurement difficulties, analysis on the developing region of a turbulent round jet has been omitted despite its vast significance in explaining the establishment of the fully developed counterpart. With a self-developed novel and sophisticated laser Doppler system that can accurately measure high turbulence intensity flow with high spatial resolution and dynamics range, a turbulent round jet is mapped in terms of statistical moments along the centerline throughout and beyond the developing region. About 25-30 jet exit diameters downstream, turbulence begins to approach the fully developed state where the mean velocity and variance develop in parallel in a seeming equilibrium. Turbulence intensity is consequently observed to initially increase before levelling out when approaching the fully developed state. The downstream development of the measured spatial energy spectra and second-order structure functions further support these observations in that they begin to develop the Kolmogorov characteristic-5/3 and 2/3 slopes in the inertial subrange within the downstream distance of 25-30 jet exit diameters. The dissipation can be to a reasonable approximation extracted from the third-order structure functions from about 20 jet exit diameters and further downstream. The results should be useful for development of analytic and numerical turbulence models. Penerbit Akademia Baru 2019-12 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/24258/2/PUBLISHED%20VERSION%20DEC2019.PDF Yaacob, Mohd Rusdy and Buchhave, Preben and Velte, Clara Marika (2019) Statistical Description Of The Turbulent Round Jet Developing Region Along Its Centerline. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 64 (2). pp. 337-353. ISSN 2289-7879 http://www.akademiabaru.com/doc/ARFMTSV64_N2_P337_353.pdf
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
description Due to the technical measurement difficulties, analysis on the developing region of a turbulent round jet has been omitted despite its vast significance in explaining the establishment of the fully developed counterpart. With a self-developed novel and sophisticated laser Doppler system that can accurately measure high turbulence intensity flow with high spatial resolution and dynamics range, a turbulent round jet is mapped in terms of statistical moments along the centerline throughout and beyond the developing region. About 25-30 jet exit diameters downstream, turbulence begins to approach the fully developed state where the mean velocity and variance develop in parallel in a seeming equilibrium. Turbulence intensity is consequently observed to initially increase before levelling out when approaching the fully developed state. The downstream development of the measured spatial energy spectra and second-order structure functions further support these observations in that they begin to develop the Kolmogorov characteristic-5/3 and 2/3 slopes in the inertial subrange within the downstream distance of 25-30 jet exit diameters. The dissipation can be to a reasonable approximation extracted from the third-order structure functions from about 20 jet exit diameters and further downstream. The results should be useful for development of analytic and numerical turbulence models.
format Article
author Yaacob, Mohd Rusdy
Buchhave, Preben
Velte, Clara Marika
spellingShingle Yaacob, Mohd Rusdy
Buchhave, Preben
Velte, Clara Marika
Statistical Description Of The Turbulent Round Jet Developing Region Along Its Centerline
author_facet Yaacob, Mohd Rusdy
Buchhave, Preben
Velte, Clara Marika
author_sort Yaacob, Mohd Rusdy
title Statistical Description Of The Turbulent Round Jet Developing Region Along Its Centerline
title_short Statistical Description Of The Turbulent Round Jet Developing Region Along Its Centerline
title_full Statistical Description Of The Turbulent Round Jet Developing Region Along Its Centerline
title_fullStr Statistical Description Of The Turbulent Round Jet Developing Region Along Its Centerline
title_full_unstemmed Statistical Description Of The Turbulent Round Jet Developing Region Along Its Centerline
title_sort statistical description of the turbulent round jet developing region along its centerline
publisher Penerbit Akademia Baru
publishDate 2019
url http://eprints.utem.edu.my/id/eprint/24258/2/PUBLISHED%20VERSION%20DEC2019.PDF
http://eprints.utem.edu.my/id/eprint/24258/
http://www.akademiabaru.com/doc/ARFMTSV64_N2_P337_353.pdf
_version_ 1675330919306625024
score 13.223943

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