Active control of base pressure with counter clockwise rotating cylinder at Mach 2
The effect of dynamic cylinder as an active controller to control the base pressure for different level of expansion have been experimentally investigated at Mach 2 through CD nozzle for area ratio 9. Solitary counter clockwise rotating cylinder of 2 mm diameter when seen from top, at 2 mm from...
| Main Authors: | , , |
|---|---|
| Format: | Proceeding Paper |
| Language: | English English English |
| Published: |
Institute of Electrical and Electronics Engineers Inc.
2018
|
| Subjects: | |
| Online Access: | http://irep.iium.edu.my/67151/ http://irep.iium.edu.my/67151/1/67151_Active%20Control%20of%20Base%20Pressure%20with%20Counter_complete.pdf http://irep.iium.edu.my/67151/2/67151_Active%20Control%20of%20Base%20Pressure%20with%20Counter_scopus.pdf http://irep.iium.edu.my/67151/13/67151_Active%20Control%20of%20Base%20Pressure%20with%20Counter%20_wos.pdf |
| _version_ | 1848786707022872576 |
|---|---|
| author | Asadullah, Mohammed Khan, Sher Afghan Asrar, Waqar |
| author_facet | Asadullah, Mohammed Khan, Sher Afghan Asrar, Waqar |
| author_sort | Asadullah, Mohammed |
| building | IIUM Repository |
| collection | Online Access |
| description | The effect of dynamic cylinder as an active
controller to control the base pressure for different level of
expansion have been experimentally investigated at Mach 2
through CD nozzle for area ratio 9. Solitary counter clockwise
rotating cylinder of 2 mm diameter when seen from top, at 2 mm
from side wall of square duct and 8 mm from square nozzle exit in
the base region is mounted as a controller. Base pressure in the
wake area after sudden expansion of jets from the exit of nozzle
has been measured. The length-to-width ratio of sudden expansion
duct taken is 10. The experiments were carried out by operating
jets for different nozzle pressure ratios (NPR). The wall pressure
distribution was also measured for with and without control cases
in the duct to see that the amplitude of oscillations does not
adversely influence the flow field in the duct. Counter clockwise
rotating cylinder as an active controller were found to increase the
base pressure as high as 62 percent at NPR 8.5 and 53 percent at
NPR 7.8. The control effectiveness is marginal for over expanded
nozzles. The wall pressure flow field with and without control are
identical with minor fluctuations. |
| first_indexed | 2025-11-14T17:13:18Z |
| format | Proceeding Paper |
| id | iium-67151 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English English |
| last_indexed | 2025-11-14T17:13:18Z |
| publishDate | 2018 |
| publisher | Institute of Electrical and Electronics Engineers Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-671512019-08-08T08:58:41Z http://irep.iium.edu.my/67151/ Active control of base pressure with counter clockwise rotating cylinder at Mach 2 Asadullah, Mohammed Khan, Sher Afghan Asrar, Waqar T Technology (General) TJ Mechanical engineering and machinery The effect of dynamic cylinder as an active controller to control the base pressure for different level of expansion have been experimentally investigated at Mach 2 through CD nozzle for area ratio 9. Solitary counter clockwise rotating cylinder of 2 mm diameter when seen from top, at 2 mm from side wall of square duct and 8 mm from square nozzle exit in the base region is mounted as a controller. Base pressure in the wake area after sudden expansion of jets from the exit of nozzle has been measured. The length-to-width ratio of sudden expansion duct taken is 10. The experiments were carried out by operating jets for different nozzle pressure ratios (NPR). The wall pressure distribution was also measured for with and without control cases in the duct to see that the amplitude of oscillations does not adversely influence the flow field in the duct. Counter clockwise rotating cylinder as an active controller were found to increase the base pressure as high as 62 percent at NPR 8.5 and 53 percent at NPR 7.8. The control effectiveness is marginal for over expanded nozzles. The wall pressure flow field with and without control are identical with minor fluctuations. Institute of Electrical and Electronics Engineers Inc. 2018-01-31 Proceeding Paper PeerReviewed application/pdf en http://irep.iium.edu.my/67151/1/67151_Active%20Control%20of%20Base%20Pressure%20with%20Counter_complete.pdf application/pdf en http://irep.iium.edu.my/67151/2/67151_Active%20Control%20of%20Base%20Pressure%20with%20Counter_scopus.pdf application/pdf en http://irep.iium.edu.my/67151/13/67151_Active%20Control%20of%20Base%20Pressure%20with%20Counter%20_wos.pdf Asadullah, Mohammed and Khan, Sher Afghan and Asrar, Waqar (2018) Active control of base pressure with counter clockwise rotating cylinder at Mach 2. In: 4th IEEE International Conference on Engineering Technologies and Applied Sciences, ICETAS 2017, 29 November - 1 December 2017, AMA International University Salmabad; Bahrain. https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8277857 10.1109/ICETAS.2017.8277857 |
| spellingShingle | T Technology (General) TJ Mechanical engineering and machinery Asadullah, Mohammed Khan, Sher Afghan Asrar, Waqar Active control of base pressure with counter clockwise rotating cylinder at Mach 2 |
| title | Active control of base pressure with counter clockwise rotating cylinder at Mach 2 |
| title_full | Active control of base pressure with counter clockwise rotating cylinder at Mach 2 |
| title_fullStr | Active control of base pressure with counter clockwise rotating cylinder at Mach 2 |
| title_full_unstemmed | Active control of base pressure with counter clockwise rotating cylinder at Mach 2 |
| title_short | Active control of base pressure with counter clockwise rotating cylinder at Mach 2 |
| title_sort | active control of base pressure with counter clockwise rotating cylinder at mach 2 |
| topic | T Technology (General) TJ Mechanical engineering and machinery |
| url | http://irep.iium.edu.my/67151/ http://irep.iium.edu.my/67151/ http://irep.iium.edu.my/67151/ http://irep.iium.edu.my/67151/1/67151_Active%20Control%20of%20Base%20Pressure%20with%20Counter_complete.pdf http://irep.iium.edu.my/67151/2/67151_Active%20Control%20of%20Base%20Pressure%20with%20Counter_scopus.pdf http://irep.iium.edu.my/67151/13/67151_Active%20Control%20of%20Base%20Pressure%20with%20Counter%20_wos.pdf |