Base pressure studies from over expanded nozzle for area ratio 2.56

The present paper aims at study of variations in base pressure at different levels of over expansion of jet in a suddenly expanded axi-symmetric duct. The results of an experimental investigation carried out at two different fixed levels of Over Expansion namely 0.277 and 0.56 are compared. The are...

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Main Authors:	Baig, Maughal Ahmed Al, Khan, Sher Afghan, Rathakrishnan, E.
Format:	Article
Language:	English
Published:	Radiance Research Academy (Regd.) 2012
Subjects:	TL500 Aeronautics
Online Access:	http://irep.iium.edu.my/49963/ http://irep.iium.edu.my/49963/ http://irep.iium.edu.my/49963/4/49963-article.pdf

id	iium-49963
recordtype	eprints
spelling	iium-499632016-07-18T01:38:58Z http://irep.iium.edu.my/49963/ Base pressure studies from over expanded nozzle for area ratio 2.56 Baig, Maughal Ahmed Al Khan, Sher Afghan Rathakrishnan, E. TL500 Aeronautics The present paper aims at study of variations in base pressure at different levels of over expansion of jet in a suddenly expanded axi-symmetric duct. The results of an experimental investigation carried out at two different fixed levels of Over Expansion namely 0.277 and 0.56 are compared. The area ratio of the present study is 2.56. The jet Mach numbers at the entry to the suddenly expanded duct, studied are 2.2 and 2.58. The length-to-diameter ratio of the suddenly expanded duct is varied from 10 to 1. Active control in the form of four micro jets of 1mm orifice diameter located at 900 intervals along a pitch circle diameter of 1.3 times the nozzle exit diameter in the base region are employed. In addition to base pressure, wall pressure field along the duct is also studied. From the present studies it is found that at a high level of over expansion micro jets are marginally effective. It is also found from wall pressure studies that the micro jets do not disturb the flow field in the enlarged duct. Radiance Research Academy (Regd.) 2012-06 Article PeerReviewed application/pdf en http://irep.iium.edu.my/49963/4/49963-article.pdf Baig, Maughal Ahmed Al and Khan, Sher Afghan and Rathakrishnan, E. (2012) Base pressure studies from over expanded nozzle for area ratio 2.56. International Journal of Current Research and Review, 4 (11). pp. 107-112. ISSN 2231-2196 E-ISSN 0975-5241 http://www.ijcrr.com/Journals/Vol%204%20issue%2011.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TL500 Aeronautics
spellingShingle	TL500 Aeronautics Baig, Maughal Ahmed Al Khan, Sher Afghan Rathakrishnan, E. Base pressure studies from over expanded nozzle for area ratio 2.56
description	The present paper aims at study of variations in base pressure at different levels of over expansion of jet in a suddenly expanded axi-symmetric duct. The results of an experimental investigation carried out at two different fixed levels of Over Expansion namely 0.277 and 0.56 are compared. The area ratio of the present study is 2.56. The jet Mach numbers at the entry to the suddenly expanded duct, studied are 2.2 and 2.58. The length-to-diameter ratio of the suddenly expanded duct is varied from 10 to 1. Active control in the form of four micro jets of 1mm orifice diameter located at 900 intervals along a pitch circle diameter of 1.3 times the nozzle exit diameter in the base region are employed. In addition to base pressure, wall pressure field along the duct is also studied. From the present studies it is found that at a high level of over expansion micro jets are marginally effective. It is also found from wall pressure studies that the micro jets do not disturb the flow field in the enlarged duct.
format	Article
author	Baig, Maughal Ahmed Al Khan, Sher Afghan Rathakrishnan, E.
author_facet	Baig, Maughal Ahmed Al Khan, Sher Afghan Rathakrishnan, E.
author_sort	Baig, Maughal Ahmed Al
title	Base pressure studies from over expanded nozzle for area ratio 2.56
title_short	Base pressure studies from over expanded nozzle for area ratio 2.56
title_full	Base pressure studies from over expanded nozzle for area ratio 2.56
title_fullStr	Base pressure studies from over expanded nozzle for area ratio 2.56
title_full_unstemmed	Base pressure studies from over expanded nozzle for area ratio 2.56
title_sort	base pressure studies from over expanded nozzle for area ratio 2.56
publisher	Radiance Research Academy (Regd.)
publishDate	2012
url	http://irep.iium.edu.my/49963/ http://irep.iium.edu.my/49963/ http://irep.iium.edu.my/49963/4/49963-article.pdf
first_indexed	2023-09-18T21:10:36Z
last_indexed	2023-09-18T21:10:36Z
_version_	1777411226907705344

Base pressure studies from over expanded nozzle for area ratio 2.56

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