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Wall Pressure Measurements Beneath the Supersonic Jets in an Abruptly Augmented Nozzle

The ballistic research has introduced the requirements for obtaining aerodynamic data including base and wall pressures over a very wide range of Mach number, Reynolds number, and manipulation of these forces by applying both active and passive control strategies. The manipulation of base and wall p...

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Main Authors: Bashir, Musavir, Khan, Sher Afghan, Choudhary, Zakir Ilahi, Shinde, V. S.
Format: Article
Language:English
English
Published: akademia Baru 2020
Subjects:
TL780 Rockets
Online Access:http://irep.iium.edu.my/79456/7/79456_Wall%20pressure%20measurements%20beneath%20the%20supersonic%20jets%20in%20an%20abruptly%20augmented%20nozzle.pdf
http://irep.iium.edu.my/79456/8/79456_Wall%20pressure%20measurements%20beneath%20the%20supersonic%20jets%20in%20an%20abruptly%20augmented%20nozzle_Scopus.pdf
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spelling my.iium.irep.794562020-11-25T08:09:28Z http://irep.iium.edu.my/79456/ Wall Pressure Measurements Beneath the Supersonic Jets in an Abruptly Augmented Nozzle Bashir, Musavir Khan, Sher Afghan Choudhary, Zakir Ilahi Shinde, V. S. TL780 Rockets The ballistic research has introduced the requirements for obtaining aerodynamic data including base and wall pressures over a very wide range of Mach number, Reynolds number, and manipulation of these forces by applying both active and passive control strategies. The manipulation of base and wall pressure plays a significant role in bluff body aerodynamics and control of aerodynamic forces is essential in the reduction of drag and improving the overall performance of such bodies. In this study, an experimental investigation was conducted in sudden expansion axis-symmetric passage for controlling wall pressure. Micro jets constituting four micro-holes around base and symmetric to nozzle axis are used as active control to manipulate the wall pressure. Wall pressure distribution is depicted for Mach numbers 1.25 and 1.3 respectively. Length-to-diameter (L/D) ratios of current investigation range from 10 to 5 with area ratios of 2.56. It is found that wall pressure is highly impacted by the microjet flow control at certain Mach numbers and geometrical parameters like the area ratio and L/D ratio also play a significant role in flow control and 50 % to 60% increase in the wall pressure is found at L/D = 10. It is also shown that the nozzle pressure ratio (NPR) also influences the wall pressure. However, the wall pressure distribution of the ducts is found fluctuating in nature in case of correctly expanded flows and remains ineffective even with microjet control. akademia Baru 2020-03-04 Article PeerReviewed application/pdf en http://irep.iium.edu.my/79456/7/79456_Wall%20pressure%20measurements%20beneath%20the%20supersonic%20jets%20in%20an%20abruptly%20augmented%20nozzle.pdf application/pdf en http://irep.iium.edu.my/79456/8/79456_Wall%20pressure%20measurements%20beneath%20the%20supersonic%20jets%20in%20an%20abruptly%20augmented%20nozzle_Scopus.pdf Bashir, Musavir and Khan, Sher Afghan and Choudhary, Zakir Ilahi and Shinde, V. S. (2020) Wall Pressure Measurements Beneath the Supersonic Jets in an Abruptly Augmented Nozzle. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 66 (2). pp. 20-31. ISSN 2289-7879 http://www.akademiabaru.com/arfmts.html
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 TL780 Rockets
spellingShingle TL780 Rockets
Bashir, Musavir
Khan, Sher Afghan
Choudhary, Zakir Ilahi
Shinde, V. S.
Wall Pressure Measurements Beneath the Supersonic Jets in an Abruptly Augmented Nozzle
description The ballistic research has introduced the requirements for obtaining aerodynamic data including base and wall pressures over a very wide range of Mach number, Reynolds number, and manipulation of these forces by applying both active and passive control strategies. The manipulation of base and wall pressure plays a significant role in bluff body aerodynamics and control of aerodynamic forces is essential in the reduction of drag and improving the overall performance of such bodies. In this study, an experimental investigation was conducted in sudden expansion axis-symmetric passage for controlling wall pressure. Micro jets constituting four micro-holes around base and symmetric to nozzle axis are used as active control to manipulate the wall pressure. Wall pressure distribution is depicted for Mach numbers 1.25 and 1.3 respectively. Length-to-diameter (L/D) ratios of current investigation range from 10 to 5 with area ratios of 2.56. It is found that wall pressure is highly impacted by the microjet flow control at certain Mach numbers and geometrical parameters like the area ratio and L/D ratio also play a significant role in flow control and 50 % to 60% increase in the wall pressure is found at L/D = 10. It is also shown that the nozzle pressure ratio (NPR) also influences the wall pressure. However, the wall pressure distribution of the ducts is found fluctuating in nature in case of correctly expanded flows and remains ineffective even with microjet control.
format Article
author Bashir, Musavir
Khan, Sher Afghan
Choudhary, Zakir Ilahi
Shinde, V. S.
author_facet Bashir, Musavir
Khan, Sher Afghan
Choudhary, Zakir Ilahi
Shinde, V. S.
author_sort Bashir, Musavir
title Wall Pressure Measurements Beneath the Supersonic Jets in an Abruptly Augmented Nozzle
title_short Wall Pressure Measurements Beneath the Supersonic Jets in an Abruptly Augmented Nozzle
title_full Wall Pressure Measurements Beneath the Supersonic Jets in an Abruptly Augmented Nozzle
title_fullStr Wall Pressure Measurements Beneath the Supersonic Jets in an Abruptly Augmented Nozzle
title_full_unstemmed Wall Pressure Measurements Beneath the Supersonic Jets in an Abruptly Augmented Nozzle
title_sort wall pressure measurements beneath the supersonic jets in an abruptly augmented nozzle
publisher akademia Baru
publishDate 2020
url http://irep.iium.edu.my/79456/7/79456_Wall%20pressure%20measurements%20beneath%20the%20supersonic%20jets%20in%20an%20abruptly%20augmented%20nozzle.pdf
http://irep.iium.edu.my/79456/8/79456_Wall%20pressure%20measurements%20beneath%20the%20supersonic%20jets%20in%20an%20abruptly%20augmented%20nozzle_Scopus.pdf
http://irep.iium.edu.my/79456/
http://www.akademiabaru.com/arfmts.html
_version_ 1684653050374914048
score 13.211869

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