Effect of area ratio on base pressure and control effectiveness
Reducing the base drag and increasing the base pressure from aerodynamic devices involving suddenly expanded flows is of vital importance due to the higher rate of drag associated with them. The experimental effort put into understanding the variation in base pressure using active control of suddenl...
| Main Authors: | , |
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| Format: | Article |
| Language: | English English |
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Blue Eyes Intelligence Engineering & Sciences
2019
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/73975/ http://irep.iium.edu.my/73975/1/FGM-SAK.pdf http://irep.iium.edu.my/73975/7/73975_Effect%20of%20area%20ratio%20on%20base%20pressure_scopus.pdf |
| _version_ | 1848787889939283968 |
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| author | G. M., Fharukh Ahmed Khan, Sher Afghan |
| author_facet | G. M., Fharukh Ahmed Khan, Sher Afghan |
| author_sort | G. M., Fharukh Ahmed |
| building | IIUM Repository |
| collection | Online Access |
| description | Reducing the base drag and increasing the base pressure from aerodynamic devices involving suddenly expanded flows is of vital importance due to the higher rate of drag associated with them. The experimental effort put into understanding the variation in base pressure using active control of suddenly expanded flows employing microjets is reported in this article. The effect of tiny jets and nozzle pressure ratio (NPR), and length to diameter (L/D) ratio on the percentage change in base pressure is investigated at supersonic Mach numbers at 1.7, 2.3, and 2.7, for area ratios of 2.56, 5.06, and 7.56. Apart from NPR, the L/D ratio has an influential role in percentage change in base pressure at different Mach numbers. An improvement of up to 360 % in base pressure is obtained with the use of sonic microjets at a particular Mach number and L/D ratio. |
| first_indexed | 2025-11-14T17:32:07Z |
| format | Article |
| id | iium-73975 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-14T17:32:07Z |
| publishDate | 2019 |
| publisher | Blue Eyes Intelligence Engineering & Sciences |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-739752020-08-24T08:22:57Z http://irep.iium.edu.my/73975/ Effect of area ratio on base pressure and control effectiveness G. M., Fharukh Ahmed Khan, Sher Afghan TL787 Astronautics Reducing the base drag and increasing the base pressure from aerodynamic devices involving suddenly expanded flows is of vital importance due to the higher rate of drag associated with them. The experimental effort put into understanding the variation in base pressure using active control of suddenly expanded flows employing microjets is reported in this article. The effect of tiny jets and nozzle pressure ratio (NPR), and length to diameter (L/D) ratio on the percentage change in base pressure is investigated at supersonic Mach numbers at 1.7, 2.3, and 2.7, for area ratios of 2.56, 5.06, and 7.56. Apart from NPR, the L/D ratio has an influential role in percentage change in base pressure at different Mach numbers. An improvement of up to 360 % in base pressure is obtained with the use of sonic microjets at a particular Mach number and L/D ratio. Blue Eyes Intelligence Engineering & Sciences 2019-07 Article PeerReviewed application/pdf en http://irep.iium.edu.my/73975/1/FGM-SAK.pdf application/pdf en http://irep.iium.edu.my/73975/7/73975_Effect%20of%20area%20ratio%20on%20base%20pressure_scopus.pdf G. M., Fharukh Ahmed and Khan, Sher Afghan (2019) Effect of area ratio on base pressure and control effectiveness. International Journal of Recent Technology and Engineering, 8 (2S3). pp. 953-958. E-ISSN 2277-3878 https://www.ijrte.org/wp-content/uploads/papers/v8i2S3/B11790782S319.pdf 10.35940/ijrte.B1179.0782S319 |
| spellingShingle | TL787 Astronautics G. M., Fharukh Ahmed Khan, Sher Afghan Effect of area ratio on base pressure and control effectiveness |
| title | Effect of area ratio on base pressure and control effectiveness |
| title_full | Effect of area ratio on base pressure and control effectiveness |
| title_fullStr | Effect of area ratio on base pressure and control effectiveness |
| title_full_unstemmed | Effect of area ratio on base pressure and control effectiveness |
| title_short | Effect of area ratio on base pressure and control effectiveness |
| title_sort | effect of area ratio on base pressure and control effectiveness |
| topic | TL787 Astronautics |
| url | http://irep.iium.edu.my/73975/ http://irep.iium.edu.my/73975/ http://irep.iium.edu.my/73975/ http://irep.iium.edu.my/73975/1/FGM-SAK.pdf http://irep.iium.edu.my/73975/7/73975_Effect%20of%20area%20ratio%20on%20base%20pressure_scopus.pdf |