Control of base flows with micro jets

This paper presents the results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage. Active control in the form of micro jets was employed to control the base pressure. Air injection at four locations at the base, symmetric to t...

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Main Authors:	Ahmed Ali Baig, Maughal, Al-Mufadi, Farhad, Khan, Sher Afghan, Rathakrishnan, Ethirajan
Format:	Article
Language:	English
Published:	Walter de Gruyter 2011
Subjects:	TL500 Aeronautics
Online Access:	http://irep.iium.edu.my/46687/ http://irep.iium.edu.my/46687/ http://irep.iium.edu.my/46687/ http://irep.iium.edu.my/46687/1/ijtkhan.pdf

id	iium-46687
recordtype	eprints
spelling	iium-466872016-07-20T01:14:52Z http://irep.iium.edu.my/46687/ Control of base flows with micro jets Ahmed Ali Baig, Maughal Al-Mufadi, Farhad Khan, Sher Afghan Rathakrishnan, Ethirajan TL500 Aeronautics This paper presents the results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage. Active control in the form of micro jets was employed to control the base pressure. Air injection at four locations at the base, symmetric to the nozzle axis was used as the active control. The jet Mach numbers at the entry to the suddenly expanded duct studied were 1.87, 2.2 and 2.58. The area ratio of the present study was 2.56. The length-to-diameter ratio of the suddenly expanded duct varied from 10 to 1. Nozzles generating the above jet Mach numbers were operated with nozzle pressure ratio (NPR) in the range 3 to 11. In addition to base pressure, wall pressure field along the duct was also studied. It is found that the active control in the form of blowing through small orifices (micro jets) are effective in controlling the base pressure field. As high as 65 percent increase in base pressure was achieved for certain combination of parameters of the present study. Micro jets do not disturb the flow field in the enlarged duct. Walter de Gruyter 2011-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/46687/1/ijtkhan.pdf Ahmed Ali Baig, Maughal and Al-Mufadi, Farhad and Khan, Sher Afghan and Rathakrishnan, Ethirajan (2011) Control of base flows with micro jets. International Journal of Turbo & Jet-Engines, 28 (1). pp. 59-69. ISSN 0334-0082 E-ISSN 2191-0332 http://www.degruyter.com/view/j/tjj.2011.28.issue-1/tjj.2011.009/tjj.2011.009.xml?format=INT 10.1515/tjj.2011.009.
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 Ahmed Ali Baig, Maughal Al-Mufadi, Farhad Khan, Sher Afghan Rathakrishnan, Ethirajan Control of base flows with micro jets
description	This paper presents the results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage. Active control in the form of micro jets was employed to control the base pressure. Air injection at four locations at the base, symmetric to the nozzle axis was used as the active control. The jet Mach numbers at the entry to the suddenly expanded duct studied were 1.87, 2.2 and 2.58. The area ratio of the present study was 2.56. The length-to-diameter ratio of the suddenly expanded duct varied from 10 to 1. Nozzles generating the above jet Mach numbers were operated with nozzle pressure ratio (NPR) in the range 3 to 11. In addition to base pressure, wall pressure field along the duct was also studied. It is found that the active control in the form of blowing through small orifices (micro jets) are effective in controlling the base pressure field. As high as 65 percent increase in base pressure was achieved for certain combination of parameters of the present study. Micro jets do not disturb the flow field in the enlarged duct.
format	Article
author	Ahmed Ali Baig, Maughal Al-Mufadi, Farhad Khan, Sher Afghan Rathakrishnan, Ethirajan
author_facet	Ahmed Ali Baig, Maughal Al-Mufadi, Farhad Khan, Sher Afghan Rathakrishnan, Ethirajan
author_sort	Ahmed Ali Baig, Maughal
title	Control of base flows with micro jets
title_short	Control of base flows with micro jets
title_full	Control of base flows with micro jets
title_fullStr	Control of base flows with micro jets
title_full_unstemmed	Control of base flows with micro jets
title_sort	control of base flows with micro jets
publisher	Walter de Gruyter
publishDate	2011
url	http://irep.iium.edu.my/46687/ http://irep.iium.edu.my/46687/ http://irep.iium.edu.my/46687/ http://irep.iium.edu.my/46687/1/ijtkhan.pdf
first_indexed	2023-09-18T21:06:27Z
last_indexed	2023-09-18T21:06:27Z
_version_	1777410965606760448

Control of base flows with micro jets

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