Role of active control in increasing base pressure at Sonic Mach Number

Use of microjets as an active control mechanism to control the base pressure in suddenly expanded flow from the C-D nozzle exhausted to the duct is investigated in this article. Experimental analysis is carried out at sonic Mach number and different nozzle pressure ratios. The enlarged diameter used...

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Main Authors:	G. M, Fharukh Ahmed, Khan, Sher Afghan
Format:	Article
Language:	English
Published:	Blue Eyes Intelligence Engineering & Sciences 2019
Subjects:	TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets
Online Access:	http://irep.iium.edu.my/73974/ http://irep.iium.edu.my/73974/ http://irep.iium.edu.my/73974/ http://irep.iium.edu.my/73974/1/FGM.pdf

id	iium-73974
recordtype	eprints
spelling	iium-739742019-09-06T01:06:47Z http://irep.iium.edu.my/73974/ Role of active control in increasing base pressure at Sonic Mach Number G. M, Fharukh Ahmed Khan, Sher Afghan TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets Use of microjets as an active control mechanism to control the base pressure in suddenly expanded flow from the C-D nozzle exhausted to the duct is investigated in this article. Experimental analysis is carried out at sonic Mach number and different nozzle pressure ratios. The enlarged diameter used in this investigation is 16 mm, 22.5 mm, and 27.5 mm. The length and diameter of the duct where the flow expands are also varied during the analysis. The role played by four micro jets of 1 mm diameter as an orifice to regulate the base pressure. The results as the percentage increase in base pressure are plotted for different level expansion and area ratio. For higher NPR = 7, the control significantly increases the base pressure without disturbing the wall pressure distribution. L/D = 3 and 4 seems to be optimum in resulting in a maximum increase in base pressure. For lower area ratio the minimum duct length required is L/D =3, whereas for the highest area-ratio this limit is L/D =4. Blue Eyes Intelligence Engineering & Sciences 2019-07 Article PeerReviewed application/pdf en http://irep.iium.edu.my/73974/1/FGM.pdf G. M, Fharukh Ahmed and Khan, Sher Afghan (2019) Role of active control in increasing base pressure at Sonic Mach Number. International Journal of Recent Technology and Engineering, 8 (2S3). pp. 966-970. E-ISSN 2277-3878 https://www.ijrte.org/wp-content/uploads/papers/v8i2S3/B11810782S319.pdf 10.35940/ijrte.B1181.0782S319
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets
spellingShingle	TL Motor vehicles. Aeronautics. Astronautics TL780 Rockets G. M, Fharukh Ahmed Khan, Sher Afghan Role of active control in increasing base pressure at Sonic Mach Number
description	Use of microjets as an active control mechanism to control the base pressure in suddenly expanded flow from the C-D nozzle exhausted to the duct is investigated in this article. Experimental analysis is carried out at sonic Mach number and different nozzle pressure ratios. The enlarged diameter used in this investigation is 16 mm, 22.5 mm, and 27.5 mm. The length and diameter of the duct where the flow expands are also varied during the analysis. The role played by four micro jets of 1 mm diameter as an orifice to regulate the base pressure. The results as the percentage increase in base pressure are plotted for different level expansion and area ratio. For higher NPR = 7, the control significantly increases the base pressure without disturbing the wall pressure distribution. L/D = 3 and 4 seems to be optimum in resulting in a maximum increase in base pressure. For lower area ratio the minimum duct length required is L/D =3, whereas for the highest area-ratio this limit is L/D =4.
format	Article
author	G. M, Fharukh Ahmed Khan, Sher Afghan
author_facet	G. M, Fharukh Ahmed Khan, Sher Afghan
author_sort	G. M, Fharukh Ahmed
title	Role of active control in increasing base pressure at Sonic Mach Number
title_short	Role of active control in increasing base pressure at Sonic Mach Number
title_full	Role of active control in increasing base pressure at Sonic Mach Number
title_fullStr	Role of active control in increasing base pressure at Sonic Mach Number
title_full_unstemmed	Role of active control in increasing base pressure at Sonic Mach Number
title_sort	role of active control in increasing base pressure at sonic mach number
publisher	Blue Eyes Intelligence Engineering & Sciences
publishDate	2019
url	http://irep.iium.edu.my/73974/ http://irep.iium.edu.my/73974/ http://irep.iium.edu.my/73974/ http://irep.iium.edu.my/73974/1/FGM.pdf
first_indexed	2023-09-18T21:44:52Z
last_indexed	2023-09-18T21:44:52Z
_version_	1777413382115164160

Role of active control in increasing base pressure at Sonic Mach Number

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