Studies on wall pressure of sonic flow through the converging nozzles for different area ratios

The experimental studies were conducted to ascertain the effectiveness of micro jets to control the base pressure in suddenly expanded axi-symmetric ducts. However, in this paper our main aim was to study the influence of the micro jets on the development of the flow field in the duct wall as well a...

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Main Authors:	Ashfaq, Syed, Khan, Sher Afghan
Format:	Article
Language:	English
Published:	RS Publication 2014
Subjects:	TL787 Astronautics
Online Access:	http://irep.iium.edu.my/49917/ http://irep.iium.edu.my/49917/ http://irep.iium.edu.my/49917/1/2014_FEBRUARY_IJETED.pdf

id	iium-49917
recordtype	eprints
spelling	iium-499172018-06-20T04:30:09Z http://irep.iium.edu.my/49917/ Studies on wall pressure of sonic flow through the converging nozzles for different area ratios Ashfaq, Syed Khan, Sher Afghan TL787 Astronautics The experimental studies were conducted to ascertain the effectiveness of micro jets to control the base pressure in suddenly expanded axi-symmetric ducts. However, in this paper our main aim was to study the influence of the micro jets on the development of the flow field in the duct wall as well as the control effectiveness of the micro jets. As it is well known that whenever, control is used it is mandatory on the part of the researcher to make sure that the control whether; active or passive control, the control does not disturb or made oscillatory the flow field in the enlarged duct.To achieve this 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. A convergent nozzle was used and the Mach number at the nozzleexit was unity. 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 length-to-diameter (i.e. L/D) ratio of the sudden expansion duct was varied from 10 to 1. From the experimental results, it is found that the micro jets can be used as an active controller for base pressure and wall pressure flow field.Further, from the results it is found that the flow field in the suddenly expanded duct is identical for with and without control cases and to quantify the effect of micro jets on the quality of flow in the duct wall pressure was measured and it is found that the micro jets do not disturb the flow field. RS Publication 2014-03 Article PeerReviewed application/pdf en http://irep.iium.edu.my/49917/1/2014_FEBRUARY_IJETED.pdf Ashfaq, Syed and Khan, Sher Afghan (2014) Studies on wall pressure of sonic flow through the converging nozzles for different area ratios. International Journal of Emerging Trends in Science and Technology, 4 (2). pp. 125-137. ISSN 2278-6856 http://rspublication.com/ijeted/2014/march14/13.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TL787 Astronautics
spellingShingle	TL787 Astronautics Ashfaq, Syed Khan, Sher Afghan Studies on wall pressure of sonic flow through the converging nozzles for different area ratios
description	The experimental studies were conducted to ascertain the effectiveness of micro jets to control the base pressure in suddenly expanded axi-symmetric ducts. However, in this paper our main aim was to study the influence of the micro jets on the development of the flow field in the duct wall as well as the control effectiveness of the micro jets. As it is well known that whenever, control is used it is mandatory on the part of the researcher to make sure that the control whether; active or passive control, the control does not disturb or made oscillatory the flow field in the enlarged duct.To achieve this 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. A convergent nozzle was used and the Mach number at the nozzleexit was unity. 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 length-to-diameter (i.e. L/D) ratio of the sudden expansion duct was varied from 10 to 1. From the experimental results, it is found that the micro jets can be used as an active controller for base pressure and wall pressure flow field.Further, from the results it is found that the flow field in the suddenly expanded duct is identical for with and without control cases and to quantify the effect of micro jets on the quality of flow in the duct wall pressure was measured and it is found that the micro jets do not disturb the flow field.
format	Article
author	Ashfaq, Syed Khan, Sher Afghan
author_facet	Ashfaq, Syed Khan, Sher Afghan
author_sort	Ashfaq, Syed
title	Studies on wall pressure of sonic flow through the converging nozzles for different area ratios
title_short	Studies on wall pressure of sonic flow through the converging nozzles for different area ratios
title_full	Studies on wall pressure of sonic flow through the converging nozzles for different area ratios
title_fullStr	Studies on wall pressure of sonic flow through the converging nozzles for different area ratios
title_full_unstemmed	Studies on wall pressure of sonic flow through the converging nozzles for different area ratios
title_sort	studies on wall pressure of sonic flow through the converging nozzles for different area ratios
publisher	RS Publication
publishDate	2014
url	http://irep.iium.edu.my/49917/ http://irep.iium.edu.my/49917/ http://irep.iium.edu.my/49917/1/2014_FEBRUARY_IJETED.pdf
first_indexed	2023-09-18T21:10:31Z
last_indexed	2023-09-18T21:10:31Z
_version_	1777411221650145280

Studies on wall pressure of sonic flow through the converging nozzles for different area ratios

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