Nozzle expansion level effect on a suddenly expanded flow

This investigation focuses attention on the effectiveness of active control in the form of micro-jets, located at the base region of a suddenly expanded axi-symmetric ducts, to control the base pressure. The experiments were conducted for Mach numbers 1.25, 1.3, 1.48, 1.6, 1.8, 2.0, 2.5, and 3.0 at...

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Main Authors:	Khan, Sher Afghan, Rathakrishnan, E.
Format:	Article
Language:	English
Published:	Walter de Gruyter 2006
Subjects:	TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets
Online Access:	http://irep.iium.edu.my/46701/ http://irep.iium.edu.my/46701/ http://irep.iium.edu.my/46701/ http://irep.iium.edu.my/46701/1/khan_s_a_-_2006_-_nozzle_expansion.pdf

id	iium-46701
recordtype	eprints
spelling	iium-467012016-07-14T23:55:07Z http://irep.iium.edu.my/46701/ Nozzle expansion level effect on a suddenly expanded flow Khan, Sher Afghan Rathakrishnan, E. TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets This investigation focuses attention on the effectiveness of active control in the form of micro-jets, located at the base region of a suddenly expanded axi-symmetric ducts, to control the base pressure. The experiments were conducted for Mach numbers 1.25, 1.3, 1.48, 1.6, 1.8, 2.0, 2.5, and 3.0 at NPRs 3, 5, 7, 9, and 11. The area ratios considered were 2.56, 3.24, 4.84, and 6.25. It is found that with increase of NPR the control becomes very effective in increasing the base pressure for all Mach numbers in the range from 1.25 to 2.0. But for higher Mach numbers the control results in decrease of base pressure compared to without control case for Mach number range from 2.5 to 3.0 for NPR 5, 7 and 9. It is found that the micro-jets can serve as active controllers for base pressure. Control effectivness increases for under expanded jets. The wall pressure distribution in the duct was also measured. It is found that the wall pressure distribution is not adversely influenced by the micro-jets. Walter de Gruyter 2006-12 Article PeerReviewed application/pdf en http://irep.iium.edu.my/46701/1/khan_s_a_-_2006_-_nozzle_expansion.pdf Khan, Sher Afghan and Rathakrishnan, E. (2006) Nozzle expansion level effect on a suddenly expanded flow. International Journal of Turbo & Jet-Engines, 23 (4). pp. 233-257. ISSN 0334-0082 E-ISSN 2191-0332 http://www.degruyter.com/view/j/tjj.2006.23.4/tjj.2006.23.4.233/tjj.2006.23.4.233.xml 10.1515/TJJ.2006.23.4.233
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 TL780 Rockets
spellingShingle	TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets Khan, Sher Afghan Rathakrishnan, E. Nozzle expansion level effect on a suddenly expanded flow
description	This investigation focuses attention on the effectiveness of active control in the form of micro-jets, located at the base region of a suddenly expanded axi-symmetric ducts, to control the base pressure. The experiments were conducted for Mach numbers 1.25, 1.3, 1.48, 1.6, 1.8, 2.0, 2.5, and 3.0 at NPRs 3, 5, 7, 9, and 11. The area ratios considered were 2.56, 3.24, 4.84, and 6.25. It is found that with increase of NPR the control becomes very effective in increasing the base pressure for all Mach numbers in the range from 1.25 to 2.0. But for higher Mach numbers the control results in decrease of base pressure compared to without control case for Mach number range from 2.5 to 3.0 for NPR 5, 7 and 9. It is found that the micro-jets can serve as active controllers for base pressure. Control effectivness increases for under expanded jets. The wall pressure distribution in the duct was also measured. It is found that the wall pressure distribution is not adversely influenced by the micro-jets.
format	Article
author	Khan, Sher Afghan Rathakrishnan, E.
author_facet	Khan, Sher Afghan Rathakrishnan, E.
author_sort	Khan, Sher Afghan
title	Nozzle expansion level effect on a suddenly expanded flow
title_short	Nozzle expansion level effect on a suddenly expanded flow
title_full	Nozzle expansion level effect on a suddenly expanded flow
title_fullStr	Nozzle expansion level effect on a suddenly expanded flow
title_full_unstemmed	Nozzle expansion level effect on a suddenly expanded flow
title_sort	nozzle expansion level effect on a suddenly expanded flow
publisher	Walter de Gruyter
publishDate	2006
url	http://irep.iium.edu.my/46701/ http://irep.iium.edu.my/46701/ http://irep.iium.edu.my/46701/ http://irep.iium.edu.my/46701/1/khan_s_a_-_2006_-_nozzle_expansion.pdf
first_indexed	2023-09-18T21:06:28Z
last_indexed	2023-09-18T21:06:28Z
_version_	1777410966599761920

Nozzle expansion level effect on a suddenly expanded flow

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