Control of base flows with micro jet for area ratio of 6.25

Suddenly expanded flow with active controls in the form of micro jets has been investigated experimentally, laying emphasis on the effectiveness of micro jets on the base pressure and enlarged duct pressure field. Air injection at four locations at the base, symmetric to the nozzle axis is used as...

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Main Authors:	Ali Baig, Maughal Ahmed, Khan, Sher Afghan, C., Ahmed Saleel, Rathakrishnan, Ethirajan
Format:	Article
Language:	English
Published:	Asian Research Publishing Network (ARPN) 2012
Subjects:	TL500 Aeronautics
Online Access:	http://irep.iium.edu.my/49823/ http://irep.iium.edu.my/49823/ http://irep.iium.edu.my/49823/1/jeas_0812_754.pdf

id	iium-49823
recordtype	eprints
spelling	iium-498232016-07-18T04:00:09Z http://irep.iium.edu.my/49823/ Control of base flows with micro jet for area ratio of 6.25 Ali Baig, Maughal Ahmed Khan, Sher Afghan C., Ahmed Saleel Rathakrishnan, Ethirajan TL500 Aeronautics Suddenly expanded flow with active controls in the form of micro jets has been investigated experimentally, laying emphasis on the effectiveness of micro jets on the base pressure and enlarged duct pressure field. Air injection at four locations at the base, symmetric to the nozzle axis is used as the active control. The jet Mach numbers of the present studies are 1.87, 2.2 and 2.58. The area ratio of present study is 6.25. The length-to-diameter ratio of the suddenly expanded duct and the Nozzle Pressure Ratio (NPR) are varied from 10 to 1 and 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. Micro jets do not augment the flow field in the duct. As high as 55 percent, increase in base pressure was achieved for certain combination of parameters of the present study. Asian Research Publishing Network (ARPN) 2012-08 Article PeerReviewed application/pdf en http://irep.iium.edu.my/49823/1/jeas_0812_754.pdf Ali Baig, Maughal Ahmed and Khan, Sher Afghan and C., Ahmed Saleel and Rathakrishnan, Ethirajan (2012) Control of base flows with micro jet for area ratio of 6.25. ARPN Journal of Engineering and Applied Sciences, 7 (8). pp. 992-1102. ISSN 1819-6608 http://www.arpnjournals.com/jeas/research_papers/rp_2012/jeas_0812_754.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 Ali Baig, Maughal Ahmed Khan, Sher Afghan C., Ahmed Saleel Rathakrishnan, Ethirajan Control of base flows with micro jet for area ratio of 6.25
description	Suddenly expanded flow with active controls in the form of micro jets has been investigated experimentally, laying emphasis on the effectiveness of micro jets on the base pressure and enlarged duct pressure field. Air injection at four locations at the base, symmetric to the nozzle axis is used as the active control. The jet Mach numbers of the present studies are 1.87, 2.2 and 2.58. The area ratio of present study is 6.25. The length-to-diameter ratio of the suddenly expanded duct and the Nozzle Pressure Ratio (NPR) are varied from 10 to 1 and 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. Micro jets do not augment the flow field in the duct. As high as 55 percent, increase in base pressure was achieved for certain combination of parameters of the present study.
format	Article
author	Ali Baig, Maughal Ahmed Khan, Sher Afghan C., Ahmed Saleel Rathakrishnan, Ethirajan
author_facet	Ali Baig, Maughal Ahmed Khan, Sher Afghan C., Ahmed Saleel Rathakrishnan, Ethirajan
author_sort	Ali Baig, Maughal Ahmed
title	Control of base flows with micro jet for area ratio of 6.25
title_short	Control of base flows with micro jet for area ratio of 6.25
title_full	Control of base flows with micro jet for area ratio of 6.25
title_fullStr	Control of base flows with micro jet for area ratio of 6.25
title_full_unstemmed	Control of base flows with micro jet for area ratio of 6.25
title_sort	control of base flows with micro jet for area ratio of 6.25
publisher	Asian Research Publishing Network (ARPN)
publishDate	2012
url	http://irep.iium.edu.my/49823/ http://irep.iium.edu.my/49823/ http://irep.iium.edu.my/49823/1/jeas_0812_754.pdf
first_indexed	2023-09-18T21:10:23Z
last_indexed	2023-09-18T21:10:23Z
_version_	1777411212936478720

Control of base flows with micro jet for area ratio of 6.25

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