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Experimental study on the mean flow characteristics of a supersonic multiple jet configuration

Systems with multiple jets are encountered in many engineering applications, for example, propulsion units in aircraft and rockets. When more than one jet is placed close to each other, the resultant aerodynamics is complicated due to the mutual interaction of the jets. In the present work, mean flo...

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Main Authors: Faheem, Mohammed, Khan, Aqib, Kumar, Rakesh, Khan, Sher Afghan, Asrar, Waqar, Sapardi, Azan M.
Format: Article
Language:English
English
Published: Elsevier 2021
Subjects:
TL Motor vehicles. Aeronautics. Astronautics
Online Access:http://irep.iium.edu.my/85792/7/85792_Experimental%20study%20on%20the%20mean%20flow%20characteristics.pdf
http://irep.iium.edu.my/85792/8/85792_Experimental%20study%20on%20the%20mean%20flow%20characteristics_Scopus.pdf
http://irep.iium.edu.my/85792/
https://www.sciencedirect.com/science/article/pii/S1270963820310592?via%3Dihub
https://doi.org/10.1016/j.ast.2020.106377
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spelling my.iium.irep.857922020-12-14T00:31:36Z http://irep.iium.edu.my/85792/ Experimental study on the mean flow characteristics of a supersonic multiple jet configuration Faheem, Mohammed Khan, Aqib Kumar, Rakesh Khan, Sher Afghan Asrar, Waqar Sapardi, Azan M. TL Motor vehicles. Aeronautics. Astronautics Systems with multiple jets are encountered in many engineering applications, for example, propulsion units in aircraft and rockets. When more than one jet is placed close to each other, the resultant aerodynamics is complicated due to the mutual interaction of the jets. In the present work, mean flowfield and the mixing characteristics of free supersonic jets from twin and triple converging-diverging nozzles placed in close proximity are studied experimentally. The nozzles are designed for Mach numbers 1.5 and 2.0, with an inter-nozzle spacing of twice the nozzle exit diameter. The typical interaction process and the evolution of the triple jet are discussed using cross-sectional contour plots. The influence of introducing additional similar jets on the near flowfield characteristics such as jet-spread, supersonic core, and the shock wave structure is studied using pressure measurements along the jet centerline. As the number of jets increases, the spreading rate decreases due to a decrease in the entrainment. This causes the jets to decay at a slow rate, and the core length increases in the order of an increased number of jets. Schlieren images of single, twin, and triple jets reveal that the supersonic jet core is different in twin and triple when compared with a single jet. Elsevier 2021-01-05 Article PeerReviewed application/pdf en http://irep.iium.edu.my/85792/7/85792_Experimental%20study%20on%20the%20mean%20flow%20characteristics.pdf application/pdf en http://irep.iium.edu.my/85792/8/85792_Experimental%20study%20on%20the%20mean%20flow%20characteristics_Scopus.pdf Faheem, Mohammed and Khan, Aqib and Kumar, Rakesh and Khan, Sher Afghan and Asrar, Waqar and Sapardi, Azan M. (2021) Experimental study on the mean flow characteristics of a supersonic multiple jet configuration. Journal of Aerospace Science & Technology, 108 (2021). pp. 1-13. ISSN 1270-9638 E-ISSN 1626-3219 https://www.sciencedirect.com/science/article/pii/S1270963820310592?via%3Dihub https://doi.org/10.1016/j.ast.2020.106377
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
English
topic TL Motor vehicles. Aeronautics. Astronautics
spellingShingle TL Motor vehicles. Aeronautics. Astronautics
Faheem, Mohammed
Khan, Aqib
Kumar, Rakesh
Khan, Sher Afghan
Asrar, Waqar
Sapardi, Azan M.
Experimental study on the mean flow characteristics of a supersonic multiple jet configuration
description Systems with multiple jets are encountered in many engineering applications, for example, propulsion units in aircraft and rockets. When more than one jet is placed close to each other, the resultant aerodynamics is complicated due to the mutual interaction of the jets. In the present work, mean flowfield and the mixing characteristics of free supersonic jets from twin and triple converging-diverging nozzles placed in close proximity are studied experimentally. The nozzles are designed for Mach numbers 1.5 and 2.0, with an inter-nozzle spacing of twice the nozzle exit diameter. The typical interaction process and the evolution of the triple jet are discussed using cross-sectional contour plots. The influence of introducing additional similar jets on the near flowfield characteristics such as jet-spread, supersonic core, and the shock wave structure is studied using pressure measurements along the jet centerline. As the number of jets increases, the spreading rate decreases due to a decrease in the entrainment. This causes the jets to decay at a slow rate, and the core length increases in the order of an increased number of jets. Schlieren images of single, twin, and triple jets reveal that the supersonic jet core is different in twin and triple when compared with a single jet.
format Article
author Faheem, Mohammed
Khan, Aqib
Kumar, Rakesh
Khan, Sher Afghan
Asrar, Waqar
Sapardi, Azan M.
author_facet Faheem, Mohammed
Khan, Aqib
Kumar, Rakesh
Khan, Sher Afghan
Asrar, Waqar
Sapardi, Azan M.
author_sort Faheem, Mohammed
title Experimental study on the mean flow characteristics of a supersonic multiple jet configuration
title_short Experimental study on the mean flow characteristics of a supersonic multiple jet configuration
title_full Experimental study on the mean flow characteristics of a supersonic multiple jet configuration
title_fullStr Experimental study on the mean flow characteristics of a supersonic multiple jet configuration
title_full_unstemmed Experimental study on the mean flow characteristics of a supersonic multiple jet configuration
title_sort experimental study on the mean flow characteristics of a supersonic multiple jet configuration
publisher Elsevier
publishDate 2021
url http://irep.iium.edu.my/85792/7/85792_Experimental%20study%20on%20the%20mean%20flow%20characteristics.pdf
http://irep.iium.edu.my/85792/8/85792_Experimental%20study%20on%20the%20mean%20flow%20characteristics_Scopus.pdf
http://irep.iium.edu.my/85792/
https://www.sciencedirect.com/science/article/pii/S1270963820310592?via%3Dihub
https://doi.org/10.1016/j.ast.2020.106377
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score 13.211869

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