Sonic Under Expanded Flow Control With Micro Jets

This paper presents the results of experimental studies to control the base pressure from a convergent nozzle under the influence of favorable pressures gradient at sonic Mach number. An active control in the form of four micro jets of 1 mm orifice diameter located at 900 intervals along a pitch cir...

Full description

Bibliographic Details
Main Authors:	Syed, Syed Ashfaq, Khan, Sher Afghan
Format:	Article
Language:	English
Published:	IJERA 2013
Subjects:	TJ170 Mechanics applied to machinery. Dynamics TL1 Motor vehicles
Online Access:	http://irep.iium.edu.my/49896/ http://irep.iium.edu.my/49896/ http://irep.iium.edu.my/49896/1/2013_NOV_DEC_IJERA.pdf

id	iium-49896
recordtype	eprints
spelling	iium-498962016-07-18T02:22:46Z http://irep.iium.edu.my/49896/ Sonic Under Expanded Flow Control With Micro Jets Syed, Syed Ashfaq Khan, Sher Afghan TJ170 Mechanics applied to machinery. Dynamics TL1 Motor vehicles This paper presents the results of experimental studies to control the base pressure from a convergent nozzle under the influence of favorable pressures gradient at sonic Mach number. An active control in the form of 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 was employed to control the base pressure. The area ratio (ratio of area of suddenly expanded duct to nozzle exit area) studied are 2.56, 3.24, 4.84 and 6.25. The L/D ratio of the sudden expansion duct varies from 10 to 1. From the results, an important aspect to be noted here is that, unlike passive controls the favorable pressure gradient does not ensure augmentation of the control effectiveness for active control in the form of micro jets. To study the effect of micro jets on the quality of flow in the enlarged duct wall pressure was measured and it is found that the micro jets do not disturb the flow field in the duct rather the quality of flow has improved due to the presence of micro jets in some cases. IJERA 2013-11 Article PeerReviewed application/pdf en http://irep.iium.edu.my/49896/1/2013_NOV_DEC_IJERA.pdf Syed, Syed Ashfaq and Khan, Sher Afghan (2013) Sonic Under Expanded Flow Control With Micro Jets. International Journal of Engineering Research and Application, 3 (6). pp. 1482-1488. ISSN 2248-9622 http://www.ijera.com
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TJ170 Mechanics applied to machinery. Dynamics TL1 Motor vehicles
spellingShingle	TJ170 Mechanics applied to machinery. Dynamics TL1 Motor vehicles Syed, Syed Ashfaq Khan, Sher Afghan Sonic Under Expanded Flow Control With Micro Jets
description	This paper presents the results of experimental studies to control the base pressure from a convergent nozzle under the influence of favorable pressures gradient at sonic Mach number. An active control in the form of 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 was employed to control the base pressure. The area ratio (ratio of area of suddenly expanded duct to nozzle exit area) studied are 2.56, 3.24, 4.84 and 6.25. The L/D ratio of the sudden expansion duct varies from 10 to 1. From the results, an important aspect to be noted here is that, unlike passive controls the favorable pressure gradient does not ensure augmentation of the control effectiveness for active control in the form of micro jets. To study the effect of micro jets on the quality of flow in the enlarged duct wall pressure was measured and it is found that the micro jets do not disturb the flow field in the duct rather the quality of flow has improved due to the presence of micro jets in some cases.
format	Article
author	Syed, Syed Ashfaq Khan, Sher Afghan
author_facet	Syed, Syed Ashfaq Khan, Sher Afghan
author_sort	Syed, Syed Ashfaq
title	Sonic Under Expanded Flow Control With Micro Jets
title_short	Sonic Under Expanded Flow Control With Micro Jets
title_full	Sonic Under Expanded Flow Control With Micro Jets
title_fullStr	Sonic Under Expanded Flow Control With Micro Jets
title_full_unstemmed	Sonic Under Expanded Flow Control With Micro Jets
title_sort	sonic under expanded flow control with micro jets
publisher	IJERA
publishDate	2013
url	http://irep.iium.edu.my/49896/ http://irep.iium.edu.my/49896/ http://irep.iium.edu.my/49896/1/2013_NOV_DEC_IJERA.pdf
first_indexed	2023-09-18T21:10:29Z
last_indexed	2023-09-18T21:10:29Z
_version_	1777411219611713536

Sonic Under Expanded Flow Control With Micro Jets

Similar Items