Control of nozzle flow in a suddenly expanded duct with micro jets

This paper presents results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage. Four micro-jets of 1 mm orifice diameter located at 900 intervals along a pitch circle diameter of 1.3 times the nozzle exit diameter in the base region...

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Main Authors:	Baig, Maugal Ahmed Ali, Khan, Sher Afghan, Rathakrishnan, E.
Format:	Article
Language:	English
Published:	ijesat.org 2012
Subjects:	TL Motor vehicles. Aeronautics. Astronautics TL500 Aeronautics
Online Access:	http://irep.iium.edu.my/49924/ http://irep.iium.edu.my/49924/ http://irep.iium.edu.my/49924/1/baig_m_a_-_2012_-_IJESAT_CONTROL_OF_NOZZLE_FLOW.pdf

id	iium-49924
recordtype	eprints
spelling	iium-499242016-07-18T02:21:16Z http://irep.iium.edu.my/49924/ Control of nozzle flow in a suddenly expanded duct with micro jets Baig, Maugal Ahmed Ali Khan, Sher Afghan Rathakrishnan, E. TL Motor vehicles. Aeronautics. Astronautics TL500 Aeronautics This paper presents results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage. Four micro-jets of 1 mm orifice diameter located at 900 intervals along a pitch circle diameter of 1.3 times the nozzle exit diameter in the base region were employed as active controls. The tests were conducted for Mach numbers 1.25, 1.3, 1.48, 1.6, 1.8, 2.0, 2.5 and 3.0. The area ratio of the present study was 6.25. The length-to-diameter ratio of the enlarged duct was 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, the wall pressure distribution in the duct was also measured. It is found that the micro jets can serve as active controllers for base pressure. On the positive side the gain was 30 per cent whereas on the negative side the decrease in base pressure was 40 per cent. After scanning the wall pressure in the enlarged duct it is found that the wall pressure distribution is not adversely affected by the micro jets. ijesat.org 2012-07 Article PeerReviewed application/pdf en http://irep.iium.edu.my/49924/1/baig_m_a_-_2012_-_IJESAT_CONTROL_OF_NOZZLE_FLOW.pdf Baig, Maugal Ahmed Ali and Khan, Sher Afghan and Rathakrishnan, E. (2012) Control of nozzle flow in a suddenly expanded duct with micro jets. International Journal of Engineeing Science and Advance Technology (IJESAT), 2 (4). pp. 789-795. ISSN 2250-3676 http://www.ijesat.org/volume2-issue4.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 Rathakrishnan, E. Control of nozzle flow in a suddenly expanded duct with micro jets
description	This paper presents results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage. Four micro-jets of 1 mm orifice diameter located at 900 intervals along a pitch circle diameter of 1.3 times the nozzle exit diameter in the base region were employed as active controls. The tests were conducted for Mach numbers 1.25, 1.3, 1.48, 1.6, 1.8, 2.0, 2.5 and 3.0. The area ratio of the present study was 6.25. The length-to-diameter ratio of the enlarged duct was 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, the wall pressure distribution in the duct was also measured. It is found that the micro jets can serve as active controllers for base pressure. On the positive side the gain was 30 per cent whereas on the negative side the decrease in base pressure was 40 per cent. After scanning the wall pressure in the enlarged duct it is found that the wall pressure distribution is not adversely affected by the micro jets.
format	Article
author	Baig, Maugal Ahmed Ali Khan, Sher Afghan Rathakrishnan, E.
author_facet	Baig, Maugal Ahmed Ali Khan, Sher Afghan Rathakrishnan, E.
author_sort	Baig, Maugal Ahmed Ali
title	Control of nozzle flow in a suddenly expanded duct with micro jets
title_short	Control of nozzle flow in a suddenly expanded duct with micro jets
title_full	Control of nozzle flow in a suddenly expanded duct with micro jets
title_fullStr	Control of nozzle flow in a suddenly expanded duct with micro jets
title_full_unstemmed	Control of nozzle flow in a suddenly expanded duct with micro jets
title_sort	control of nozzle flow in a suddenly expanded duct with micro jets
publisher	ijesat.org
publishDate	2012
url	http://irep.iium.edu.my/49924/ http://irep.iium.edu.my/49924/ http://irep.iium.edu.my/49924/1/baig_m_a_-_2012_-_IJESAT_CONTROL_OF_NOZZLE_FLOW.pdf
first_indexed	2023-09-18T21:10:32Z
last_indexed	2023-09-18T21:10:32Z
_version_	1777411222545629184

Control of nozzle flow in a suddenly expanded duct with micro jets

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