Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87

The results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage is presented in this paper. An active control in the form of micro jets is employed to control the base pressure. Air injection at four locations at the base, symmetric...

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Main Authors:	Baig, Maugal Ahmed Ali, Khan, Sher Afghan, Khan, Mohammad Yunus
Format:	Article
Language:	English
Published:	2012
Subjects:	TL Motor vehicles. Aeronautics. Astronautics TL500 Aeronautics
Online Access:	http://irep.iium.edu.my/49922/ http://irep.iium.edu.my/49922/ http://irep.iium.edu.my/49922/1/baig_m_a_-_2012_-_IJMIE_Journal_Effect_of_Area_Ratio_on_Base_P.pdf

id	iium-49922
recordtype	eprints
spelling	iium-499222016-07-20T06:56:13Z http://irep.iium.edu.my/49922/ Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87 Baig, Maugal Ahmed Ali Khan, Sher Afghan Khan, Mohammad Yunus TL Motor vehicles. Aeronautics. Astronautics TL500 Aeronautics The results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage is presented in this paper. An active control in the form of micro jets is employed to control the base pressure. Air injection at four locations at the base, symmetric to the nozzle axis is used as the active control. The jet Mach number studied and the area ratios are 1.87, and 2.56, 3.24, 4.84, and 6.25. The L/D ratio is varied from 10 to 1. The experiments are conducted at a fixed level of under expansion (i.e. Pe/Pa = 1.5). In addition to base pressure, wall pressure field along the duct was also measured. As high as 80 percent increase in base pressure was achieved for certain combination of parameters of the present study. The minimum Length-to diameter ratio of the duct required is L/D = 2 for area ratios 6.25 and 4.84. Whereas, this requirement is L/D = 1 for area ratios 2.56 and 3.24. 2012-03 Article PeerReviewed application/pdf en http://irep.iium.edu.my/49922/1/baig_m_a_-_2012_-_IJMIE_Journal_Effect_of_Area_Ratio_on_Base_P.pdf Baig, Maugal Ahmed Ali and Khan, Sher Afghan and Khan, Mohammad Yunus (2012) Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87. International Journal of Mechanical and Industrial Engineering, 2 (2). pp. 86-90. ISSN 2231-6477 http://www.interscience.in/ijmie.html
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TL Motor vehicles. Aeronautics. Astronautics TL500 Aeronautics
spellingShingle	TL Motor vehicles. Aeronautics. Astronautics TL500 Aeronautics Baig, Maugal Ahmed Ali Khan, Sher Afghan Khan, Mohammad Yunus Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87
description	The results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage is presented in this paper. An active control in the form of micro jets is employed to control the base pressure. Air injection at four locations at the base, symmetric to the nozzle axis is used as the active control. The jet Mach number studied and the area ratios are 1.87, and 2.56, 3.24, 4.84, and 6.25. The L/D ratio is varied from 10 to 1. The experiments are conducted at a fixed level of under expansion (i.e. Pe/Pa = 1.5). In addition to base pressure, wall pressure field along the duct was also measured. As high as 80 percent increase in base pressure was achieved for certain combination of parameters of the present study. The minimum Length-to diameter ratio of the duct required is L/D = 2 for area ratios 6.25 and 4.84. Whereas, this requirement is L/D = 1 for area ratios 2.56 and 3.24.
format	Article
author	Baig, Maugal Ahmed Ali Khan, Sher Afghan Khan, Mohammad Yunus
author_facet	Baig, Maugal Ahmed Ali Khan, Sher Afghan Khan, Mohammad Yunus
author_sort	Baig, Maugal Ahmed Ali
title	Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87
title_short	Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87
title_full	Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87
title_fullStr	Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87
title_full_unstemmed	Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87
title_sort	effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87
publishDate	2012
url	http://irep.iium.edu.my/49922/ http://irep.iium.edu.my/49922/ http://irep.iium.edu.my/49922/1/baig_m_a_-_2012_-_IJMIE_Journal_Effect_of_Area_Ratio_on_Base_P.pdf
first_indexed	2023-09-18T21:10:32Z
last_indexed	2023-09-18T21:10:32Z
_version_	1777411222237347840

Effect of area ratio on base pressure in a suddenly expanded duct for under expanded flow ft mach 1.87

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