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
Published:	akademia Baru 2020
Subjects:	TL780 Rockets
Online Access:	http://irep.iium.edu.my/79456/ http://irep.iium.edu.my/79456/ http://irep.iium.edu.my/79456/1/ARFMTSV66_N2_P20_31.pdf

id	iium-79456
recordtype	eprints
spelling	iium-794562020-03-19T04:02:38Z 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/79456/1/ARFMTSV66_N2_P20_31.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
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	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/ http://irep.iium.edu.my/79456/ http://irep.iium.edu.my/79456/1/ARFMTSV66_N2_P20_31.pdf
first_indexed	2023-09-18T21:51:30Z
last_indexed	2023-09-18T21:51:30Z
_version_	1777413800297758720

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

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