Experimental studies of the base flow from the nozzles with sudden expansion with micro jets

A method for evaluating the performance of micro jets, in a flow behind a highly expanded nozzle is presented. In the process, the pressure distribution of the flow behind the nozzle outlet is calculated for a defined range of Mach numbers. The outcome shows the existence of oblique shock, Mach wave...

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Main Authors:	Chaudhary, Zakir Ilahi, Shinde, V.B, Bashir, Musavir, Khan, Sher Afghan
Format:	Article
Language:	English English
Published:	NOVA Science Publishers 2016
Subjects:	TL500 Aeronautics
Online Access:	http://irep.iium.edu.my/53323/ http://irep.iium.edu.my/53323/ http://irep.iium.edu.my/53323/1/paper%201.pdf http://irep.iium.edu.my/53323/7/53323_Experimental%20studies%20of%20the%20base%20flow%20from%20the%20nozzles_SCOPUS.pdf

id	iium-53323
recordtype	eprints
spelling	iium-533232017-03-14T01:03:41Z http://irep.iium.edu.my/53323/ Experimental studies of the base flow from the nozzles with sudden expansion with micro jets Chaudhary, Zakir Ilahi Shinde, V.B Bashir, Musavir Khan, Sher Afghan TL500 Aeronautics A method for evaluating the performance of micro jets, in a flow behind a highly expanded nozzle is presented. In the process, the pressure distribution of the flow behind the nozzle outlet is calculated for a defined range of Mach numbers. The outcome shows the existence of oblique shock, Mach waves, and expansion fan in the investigation depending upon the expansion level of the shear layer at the nozzle lip. The height of the backward facing step is 2.5. The range of NPRs chosen for this case is within 3 and 11.Since very small jets are used as active control method, four jets of one millimeter hole diameter are installed for flow control. It is observed that the control effectiveness is quite good for the entire range of L/D at around Mach 2.0. For L/D ranging from 10 to 2, the decrements in the suction at the base exhibits thirty per cent increase in base pressure with micro jets. The final argument is that efficacy of the flow regulation is case sensitive and to arrive at the optimum flow variable lot of runs are needed to draw the conclusions. Also, the efficacy of very small jets is improved for suitable pressure gradient. For over expanded jets the dynamic effectiveness is minimum. The nature of flow in the abruptly expanded duct, in the presence and absence of the flow manipulator is unaltered and hence, remains identical for most of the cases. NOVA Science Publishers 2016 Article PeerReviewed application/pdf en http://irep.iium.edu.my/53323/1/paper%201.pdf application/pdf en http://irep.iium.edu.my/53323/7/53323_Experimental%20studies%20of%20the%20base%20flow%20from%20the%20nozzles_SCOPUS.pdf Chaudhary, Zakir Ilahi and Shinde, V.B and Bashir, Musavir and Khan, Sher Afghan (2016) Experimental studies of the base flow from the nozzles with sudden expansion with micro jets. International Journal of Energy, Environment, and Economics, 24 (1). pp. 59-66. ISSN 1054-853X http://search.proquest.com/openview/4fec7e7e725d6b0933f4be1bb6fa608c/1?pq-origsite=gscholar&cbl=2034867
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TL500 Aeronautics
spellingShingle	TL500 Aeronautics Chaudhary, Zakir Ilahi Shinde, V.B Bashir, Musavir Khan, Sher Afghan Experimental studies of the base flow from the nozzles with sudden expansion with micro jets
description	A method for evaluating the performance of micro jets, in a flow behind a highly expanded nozzle is presented. In the process, the pressure distribution of the flow behind the nozzle outlet is calculated for a defined range of Mach numbers. The outcome shows the existence of oblique shock, Mach waves, and expansion fan in the investigation depending upon the expansion level of the shear layer at the nozzle lip. The height of the backward facing step is 2.5. The range of NPRs chosen for this case is within 3 and 11.Since very small jets are used as active control method, four jets of one millimeter hole diameter are installed for flow control. It is observed that the control effectiveness is quite good for the entire range of L/D at around Mach 2.0. For L/D ranging from 10 to 2, the decrements in the suction at the base exhibits thirty per cent increase in base pressure with micro jets. The final argument is that efficacy of the flow regulation is case sensitive and to arrive at the optimum flow variable lot of runs are needed to draw the conclusions. Also, the efficacy of very small jets is improved for suitable pressure gradient. For over expanded jets the dynamic effectiveness is minimum. The nature of flow in the abruptly expanded duct, in the presence and absence of the flow manipulator is unaltered and hence, remains identical for most of the cases.
format	Article
author	Chaudhary, Zakir Ilahi Shinde, V.B Bashir, Musavir Khan, Sher Afghan
author_facet	Chaudhary, Zakir Ilahi Shinde, V.B Bashir, Musavir Khan, Sher Afghan
author_sort	Chaudhary, Zakir Ilahi
title	Experimental studies of the base flow from the nozzles with sudden expansion with micro jets
title_short	Experimental studies of the base flow from the nozzles with sudden expansion with micro jets
title_full	Experimental studies of the base flow from the nozzles with sudden expansion with micro jets
title_fullStr	Experimental studies of the base flow from the nozzles with sudden expansion with micro jets
title_full_unstemmed	Experimental studies of the base flow from the nozzles with sudden expansion with micro jets
title_sort	experimental studies of the base flow from the nozzles with sudden expansion with micro jets
publisher	NOVA Science Publishers
publishDate	2016
url	http://irep.iium.edu.my/53323/ http://irep.iium.edu.my/53323/ http://irep.iium.edu.my/53323/1/paper%201.pdf http://irep.iium.edu.my/53323/7/53323_Experimental%20studies%20of%20the%20base%20flow%20from%20the%20nozzles_SCOPUS.pdf
first_indexed	2023-09-18T21:15:28Z
last_indexed	2023-09-18T21:15:28Z
_version_	1777411533006962688

Experimental studies of the base flow from the nozzles with sudden expansion with micro jets

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