Experimental investigations on wall pressure in suddenly enlarged ducts at supersonic Mach number regimes
This paper presents the results of an experimental work carried out to find the wall pressure distribution in a suddenly enlarged duct. The enlarged duct is attached to the exit of a convergent- divergent axisymmetric nozzle. The area ratio (i.e. ratio between cross sectional arean of the sudden exp...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
rspublication
2012
|
| Subjects: | |
| Online Access: | http://irep.iium.edu.my/49921/ http://irep.iium.edu.my/49921/1/baig_m_a_-_2012_-_experimental_investigations_on_wall_pressure-IJETED.pdf |
| _version_ | 1848783541066792960 |
|---|---|
| author | Baig, Maugal Ahmed Ali Khan, Sher Afghan Rathakrishnan, E. |
| author_facet | Baig, Maugal Ahmed Ali Khan, Sher Afghan Rathakrishnan, E. |
| author_sort | Baig, Maugal Ahmed Ali |
| building | IIUM Repository |
| collection | Online Access |
| description | This paper presents the results of an experimental work carried out to find the wall pressure distribution in a suddenly enlarged duct. The enlarged duct is attached to the exit of a convergent- divergent axisymmetric nozzle. The area ratio (i.e. ratio between cross sectional arean of the sudden expansion duct and the nozzle exit area) considered in the present study is 4.84. The supersonic Mach number regimes considered in the present study are 1.87, 2.2 and 2.58. The length to diameter ratio is 4. The nozzle pressure ratio (NPR) used is 3, 5, 7, 9, and 11 for all the Mach numbers. An active control method in the form of Microjets is used to control the base pressure. The prime investigations are towards finding the effect of Microjets on wall pressure for above said parametric conditions. It is found that for area ratio 4.84 the Microjets which are used as active control method for base pressure, does not adversely affect the wall pressure,contradicting the peculiar oscillatory nature in the enlarged duct when controls are employed. |
| first_indexed | 2025-11-14T16:22:59Z |
| format | Article |
| id | iium-49921 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T16:22:59Z |
| publishDate | 2012 |
| publisher | rspublication |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-499212016-07-18T02:07:53Z http://irep.iium.edu.my/49921/ Experimental investigations on wall pressure in suddenly enlarged ducts at supersonic Mach number regimes Baig, Maugal Ahmed Ali Khan, Sher Afghan Rathakrishnan, E. TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets This paper presents the results of an experimental work carried out to find the wall pressure distribution in a suddenly enlarged duct. The enlarged duct is attached to the exit of a convergent- divergent axisymmetric nozzle. The area ratio (i.e. ratio between cross sectional arean of the sudden expansion duct and the nozzle exit area) considered in the present study is 4.84. The supersonic Mach number regimes considered in the present study are 1.87, 2.2 and 2.58. The length to diameter ratio is 4. The nozzle pressure ratio (NPR) used is 3, 5, 7, 9, and 11 for all the Mach numbers. An active control method in the form of Microjets is used to control the base pressure. The prime investigations are towards finding the effect of Microjets on wall pressure for above said parametric conditions. It is found that for area ratio 4.84 the Microjets which are used as active control method for base pressure, does not adversely affect the wall pressure,contradicting the peculiar oscillatory nature in the enlarged duct when controls are employed. rspublication 2012-09 Article PeerReviewed application/pdf en http://irep.iium.edu.my/49921/1/baig_m_a_-_2012_-_experimental_investigations_on_wall_pressure-IJETED.pdf Baig, Maugal Ahmed Ali and Khan, Sher Afghan and Rathakrishnan, E. (2012) Experimental investigations on wall pressure in suddenly enlarged ducts at supersonic Mach number regimes. International Journal of Emerging Trends in Engineering and Development (IJETED), 6 (2). pp. 496-504. ISSN 2249-6149 http://www.rspublication.com/ijeted/ijeted_index.htm |
| spellingShingle | TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets Baig, Maugal Ahmed Ali Khan, Sher Afghan Rathakrishnan, E. Experimental investigations on wall pressure in suddenly enlarged ducts at supersonic Mach number regimes |
| title | Experimental investigations on wall pressure in suddenly enlarged ducts at supersonic Mach number regimes |
| title_full | Experimental investigations on wall pressure in suddenly enlarged ducts at supersonic Mach number regimes |
| title_fullStr | Experimental investigations on wall pressure in suddenly enlarged ducts at supersonic Mach number regimes |
| title_full_unstemmed | Experimental investigations on wall pressure in suddenly enlarged ducts at supersonic Mach number regimes |
| title_short | Experimental investigations on wall pressure in suddenly enlarged ducts at supersonic Mach number regimes |
| title_sort | experimental investigations on wall pressure in suddenly enlarged ducts at supersonic mach number regimes |
| topic | TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets |
| url | http://irep.iium.edu.my/49921/ http://irep.iium.edu.my/49921/ http://irep.iium.edu.my/49921/1/baig_m_a_-_2012_-_experimental_investigations_on_wall_pressure-IJETED.pdf |