Control of suddenly expanded flow from correctly expanded nozzles

Control of suddenly expanded flow from correctly expanded nozzles

The effectiveness of micro jets to control base pressure in suddenly expanded axi-symmetric ducts has been presented in this paper. Four micro jets of 1 mm orifice diameter located at 90° intervals along a pitch circle diameter of 1.3 times the nozzle exit diameter in the base region were employed a...

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Main Authors: Khan, Sher Afghan, Rathakrishnan, E.
Format: Article
Language:English
Published: De Gruyter 2004
Subjects:
TL500 Aeronautics
Online Access:http://irep.iium.edu.my/46700/
http://irep.iium.edu.my/46700/
http://irep.iium.edu.my/46700/
http://irep.iium.edu.my/46700/1/khan_s_a_-_2004_-_control_correctly.pdf
id iium-46700
recordtype eprints
spelling iium-467002016-07-14T23:51:54Z http://irep.iium.edu.my/46700/ Control of suddenly expanded flow from correctly expanded nozzles Khan, Sher Afghan Rathakrishnan, E. TL500 Aeronautics The effectiveness of micro jets to control base pressure in suddenly expanded axi-symmetric ducts has been presented in this paper. Four micro jets of 1 mm orifice diameter located at 90° intervals along a pitch circle diameter of 1.3 times the nozzle exit diameter in the base region were employed as active controls. The Mach numbers of the suddenly expanded flows were 1.25, 1.30, 1.48, 1.6, 1.8 and 2.0. The jets were expanded suddenly into an axi-symmetric tube with cross-sectional area 2.56, 3.24, 4.84, and 6.25 times that of nozzle exit area. The length-to-diameter ratio of the sudden expansion tube was varied from 10 to 1. The jets at all Mach numbers were correctly expanded. It is found that the micro jets can serve as active controllers for base pressure. Also, the wall pressure distribution is not adversely influenced by the micro jets. De Gruyter 2004-12 Article PeerReviewed application/pdf en http://irep.iium.edu.my/46700/1/khan_s_a_-_2004_-_control_correctly.pdf Khan, Sher Afghan and Rathakrishnan, E. (2004) Control of suddenly expanded flow from correctly expanded nozzles. International Journal of Turbo & Jet-Engines, 21 (4). pp. 255-278. ISSN 0334-0082 E-ISSN 2191-0332 http://www.degruyter.com/view/j/tjj.2004.21.4/tjj.2004.21.4.255/tjj.2004.21.4.255.xml 10.1515/TJJ.2004.21.4.255
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
Khan, Sher Afghan
Rathakrishnan, E.
Control of suddenly expanded flow from correctly expanded nozzles
description The effectiveness of micro jets to control base pressure in suddenly expanded axi-symmetric ducts has been presented in this paper. Four micro jets of 1 mm orifice diameter located at 90° intervals along a pitch circle diameter of 1.3 times the nozzle exit diameter in the base region were employed as active controls. The Mach numbers of the suddenly expanded flows were 1.25, 1.30, 1.48, 1.6, 1.8 and 2.0. The jets were expanded suddenly into an axi-symmetric tube with cross-sectional area 2.56, 3.24, 4.84, and 6.25 times that of nozzle exit area. The length-to-diameter ratio of the sudden expansion tube was varied from 10 to 1. The jets at all Mach numbers were correctly expanded. It is found that the micro jets can serve as active controllers for base pressure. Also, 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 Control of suddenly expanded flow from correctly expanded nozzles
title_short Control of suddenly expanded flow from correctly expanded nozzles
title_full Control of suddenly expanded flow from correctly expanded nozzles
title_fullStr Control of suddenly expanded flow from correctly expanded nozzles
title_full_unstemmed Control of suddenly expanded flow from correctly expanded nozzles
title_sort control of suddenly expanded flow from correctly expanded nozzles
publisher De Gruyter
publishDate 2004
url http://irep.iium.edu.my/46700/
http://irep.iium.edu.my/46700/
http://irep.iium.edu.my/46700/
http://irep.iium.edu.my/46700/1/khan_s_a_-_2004_-_control_correctly.pdf
first_indexed 2023-09-18T21:06:28Z
last_indexed 2023-09-18T21:06:28Z
_version_ 1777410966456107008

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