Active control of suddenly expanded flow
This paper presents the results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage. An active control in the form of microjets was employed to control the base pressure. Microjets at four locations in a pitch circle diameter at...
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| Format: | Conference or Workshop Item |
| Language: | English |
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2000
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| Online Access: | http://irep.iium.edu.my/46689/ http://irep.iium.edu.my/46689/ http://irep.iium.edu.my/46689/1/46689.pdf |
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iium-46689 |
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eprints |
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iium-466892016-03-03T02:51:53Z http://irep.iium.edu.my/46689/ Active control of suddenly expanded flow Khan, Sher Afghan Sellappan, Rathakrishnan TJ163.26 Energy conservation This paper presents the results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage. An active control in the form of microjets was employed to control the base pressure. Microjets at four locations in a pitch circle diameter at the base was used as the active control. The jet Mach numbers at the entry to the sudden expansion was varied from 1.25 to 3.0. The area ratio of the present study is 3.24. The enlarged duct length-to-diameter ratio was varied from 10 to 1. The nozzle generating the above jet Mach numbers were operated with nozzle pressure ratio (NPR) in the range from 3 to 11. The wall pressure distribution in the enlarged duct was also measured to account for the effect of the active control on the enlarged duct pressure field. It is found that the microjets act as an effective control for controlling the base pressure field. A maximum of 35 percent increase in base pressure was achieved for certain combination of parameters. 2000 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/46689/1/46689.pdf Khan, Sher Afghan and Sellappan, Rathakrishnan (2000) Active control of suddenly expanded flow. In: 22nd International Symposium on Space Technology and Science (iSTS), 28th May-4th June 2000, Morioka, Japan. http://ists.or.jp |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
International Islamic University Malaysia |
| building |
IIUM Repository |
| collection |
Online Access |
| language |
English |
| topic |
TJ163.26 Energy conservation |
| spellingShingle |
TJ163.26 Energy conservation Khan, Sher Afghan Sellappan, Rathakrishnan Active control of suddenly expanded flow |
| description |
This paper presents the results of an experimental investigation carried
out to control the base pressure in a suddenly expanded axi-symmetric
passage.
An active control in the form of microjets
was employed to control the base
pressure. Microjets at four locations in a pitch circle diameter at the base
was used as the active control. The jet Mach numbers
at the entry to the sudden expansion was varied from 1.25 to 3.0.
The area ratio of the present study is 3.24.
The enlarged duct length-to-diameter ratio was
varied from 10 to 1. The nozzle generating the above jet Mach numbers
were operated with nozzle pressure ratio (NPR) in the range from 3 to 11.
The wall pressure distribution in the enlarged duct was also measured to
account for the effect of the active control on the enlarged duct pressure
field.
It is found that the microjets act as an effective control for controlling the
base pressure field.
A maximum of 35 percent increase in
base pressure was achieved for certain combination of parameters.
|
| format |
Conference or Workshop Item |
| author |
Khan, Sher Afghan Sellappan, Rathakrishnan |
| author_facet |
Khan, Sher Afghan Sellappan, Rathakrishnan |
| author_sort |
Khan, Sher Afghan |
| title |
Active control of suddenly expanded flow |
| title_short |
Active control of suddenly expanded flow |
| title_full |
Active control of suddenly expanded flow |
| title_fullStr |
Active control of suddenly expanded flow |
| title_full_unstemmed |
Active control of suddenly expanded flow |
| title_sort |
active control of suddenly expanded flow |
| publishDate |
2000 |
| url |
http://irep.iium.edu.my/46689/ http://irep.iium.edu.my/46689/ http://irep.iium.edu.my/46689/1/46689.pdf |
| first_indexed |
2023-09-18T21:06:27Z |
| last_indexed |
2023-09-18T21:06:27Z |
| _version_ |
1777410965742026752 |