Influence of tab corner geometry on supersonic jets
The purpose of this study is to evaluate the effect of tabs having different corner geometries on the flow characteristics of a supersonic convergent-divergent (C-D) nozzle. A circular C-D nozzle of Mach 2.0 was used, and the tabs were positioned at the exit of the nozzle in diametrically opposite d...
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my.iium.irep.916662021-08-24T08:00:00Z http://irep.iium.edu.my/91666/ Influence of tab corner geometry on supersonic jets Jaimon, Dennis Quadros Khan, Sher Afghan Hanumantharaya, R TL Motor vehicles. Aeronautics. Astronautics The purpose of this study is to evaluate the effect of tabs having different corner geometries on the flow characteristics of a supersonic convergent-divergent (C-D) nozzle. A circular C-D nozzle of Mach 2.0 was used, and the tabs were positioned at the exit of the nozzle in diametrically opposite directions. Three tabs having different corner geometry implemented in the experiments were rectangular tab with the triangular top edge, triangular tab with a bell-shaped edge, and tapered tab. The pressure profiles across the tabs and the centerline pressure decay along the jets were measured. The shadowgraph technique illustrated the waves present in the center of an oncoming jet. The nozzle pressure ratios (NPR) were varied from 4 to 8, in the steps of one, covering various overexpansion and under expansion levels at the exit of the nozzle. The results showed tapered tabs act as a better mixing promoter than the other tabs used in the study. A reduction of 91.25% in core length for NPR 8 was observed for the tapered tabs. Subsequently, core length reductions generated by triangular tabs with a bell-shaped top edge were 87.5%, and those caused by rectangular tabs with a triangular top edge were 7.5%. The research results could be used for designing combustion chambers and chemical reactors that require jets to enhance mixing levels. The tabs having three different corner geometries, i.e. sharp or pointed, bell-shaped, and straight-edge have never been investigated before. The idea of only modifying corners is the innovative step of this research. Emerald 2021-08-21 Article PeerReviewed application/pdf en http://irep.iium.edu.my/91666/7/91666_Influence%20of%20tab%20corner%20geometry%20on%20supersonic%20jets_Scopus.pdf application/pdf en http://irep.iium.edu.my/91666/8/91666_Influence%20of%20tab%20corner%20geometry%20on%20supersonic%20jets.pdf Jaimon, Dennis Quadros and Khan, Sher Afghan and Hanumantharaya, R (2021) Influence of tab corner geometry on supersonic jets. Aircraft Engineering and Aerospace Technology, 92 (3). pp. 1-8. ISSN 0002-2667 https://www.emerald.com/insight/content/doi/10.1108/AEAT-03-2021-0092/full/html 10.1108/AEAT-03-2021-0092] |
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TL Motor vehicles. Aeronautics. Astronautics Jaimon, Dennis Quadros Khan, Sher Afghan Hanumantharaya, R Influence of tab corner geometry on supersonic jets |
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The purpose of this study is to evaluate the effect of tabs having different corner geometries on the flow characteristics of a supersonic convergent-divergent (C-D) nozzle. A circular C-D nozzle of Mach 2.0 was used, and the tabs were positioned at the exit of the nozzle in diametrically opposite directions. Three tabs having different corner geometry implemented in the experiments were rectangular tab with the triangular top edge, triangular tab with a bell-shaped edge, and tapered tab. The pressure profiles across the tabs and the centerline pressure decay along the jets were measured. The shadowgraph technique illustrated the waves present in the center of an oncoming jet. The nozzle pressure ratios (NPR) were varied from 4 to 8, in the steps of one, covering various overexpansion and under expansion levels at the exit of the nozzle. The results showed tapered tabs act as a better mixing promoter than the other tabs used in the study. A reduction of 91.25% in core length for NPR 8 was observed for the tapered tabs. Subsequently, core length reductions generated by triangular tabs with a bell-shaped top edge were 87.5%, and those caused by rectangular tabs with a triangular top edge were 7.5%. The research results could be used for designing combustion chambers and chemical reactors that require jets to enhance
mixing levels. The tabs having three different corner geometries, i.e. sharp or pointed, bell-shaped, and straight-edge have never been investigated before. The idea of only modifying corners is the innovative step of this research. |
format |
Article |
author |
Jaimon, Dennis Quadros Khan, Sher Afghan Hanumantharaya, R |
author_facet |
Jaimon, Dennis Quadros Khan, Sher Afghan Hanumantharaya, R |
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Jaimon, Dennis Quadros |
title |
Influence of tab corner geometry on supersonic jets |
title_short |
Influence of tab corner geometry on supersonic jets |
title_full |
Influence of tab corner geometry on supersonic jets |
title_fullStr |
Influence of tab corner geometry on supersonic jets |
title_full_unstemmed |
Influence of tab corner geometry on supersonic jets |
title_sort |
influence of tab corner geometry on supersonic jets |
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Emerald |
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2021 |
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http://irep.iium.edu.my/91666/7/91666_Influence%20of%20tab%20corner%20geometry%20on%20supersonic%20jets_Scopus.pdf http://irep.iium.edu.my/91666/8/91666_Influence%20of%20tab%20corner%20geometry%20on%20supersonic%20jets.pdf http://irep.iium.edu.my/91666/ https://www.emerald.com/insight/content/doi/10.1108/AEAT-03-2021-0092/full/html |
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