Threaded spikes for bluff body base flow control

Although the demand for rockets and missiles has increased exponentially the problems of the gas dynamics related to these vehicles remains to be a challenge. The main problem is high-pressure associated with the shock wave in front and low-pressure recirculation bubble attached behind the vehicle a...

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Main Authors:	Khan, Sher Afghan, Alrobaian, Abdul Rahman, Asad Ullah, Mohammed, Rao, Ashwin
Format:	Article
Language:	English English
Published:	Akademi Baru 2019
Subjects:	TJ163.26 Energy conservation
Online Access:	http://irep.iium.edu.my/69635/ http://irep.iium.edu.my/69635/ http://irep.iium.edu.my/69635/7/69635%20Threaded%20Spikes%20for%20Bluff%20Body%20Base%20Flow%20Control.pdf http://irep.iium.edu.my/69635/8/69635%20Threaded%20Spikes%20for%20Bluff%20Body%20Base%20Flow%20Control%20SCOPUS.pdf

id	iium-69635
recordtype	eprints
spelling	iium-696352020-01-07T08:58:02Z http://irep.iium.edu.my/69635/ Threaded spikes for bluff body base flow control Khan, Sher Afghan Alrobaian, Abdul Rahman Asad Ullah, Mohammed Rao, Ashwin TJ163.26 Energy conservation Although the demand for rockets and missiles has increased exponentially the problems of the gas dynamics related to these vehicles remains to be a challenge. The main problem is high-pressure associated with the shock wave in front and low-pressure recirculation bubble attached behind the vehicle at the blunt base. This barrier of wave drag due to the shock waves and the drag due to the bubble leads to a huge amount of the fuel consumption and high fluctuations in the flow field of the enlarged duct. This paper focuses mainly on the base drag and experimentally investigated the effect of the passive control in the form of the threaded spikes for bluff bodies as the base flow controller. Two threaded spikes of length 40 mm opposite to each other and attached to a control plate of diameter 80 mm and thickness 1 mm is at pitch circle diameter of 23 mm and slot of 10 mm X 10 mm at the center, placed between the nozzle and the duct to act as the passive controller. The Mach numbers considered for the investigation in the subsonic regime were 0.6, 0.7 and in the transonic regime were 0.8, 0.9 for the enlarged duct cross-sectional area of 625 mm 2 and the exit area of the nozzle considered were 100 mm2. The lengths of the enlarged duct were 100 mm, 150 mm and 200 mm. The passive control and regulating the base pressure by threaded spikes were found very efficient without any adverse effect on the flow field of the enlarged duct. Akademi Baru 2019-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/69635/7/69635%20Threaded%20Spikes%20for%20Bluff%20Body%20Base%20Flow%20Control.pdf application/pdf en http://irep.iium.edu.my/69635/8/69635%20Threaded%20Spikes%20for%20Bluff%20Body%20Base%20Flow%20Control%20SCOPUS.pdf Khan, Sher Afghan and Alrobaian, Abdul Rahman and Asad Ullah, Mohammed and Rao, Ashwin (2019) Threaded spikes for bluff body base flow control. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 53 (2). pp. 194-203. E-ISSN 2289-7879 http://www.akademiabaru.com/doc/ARFMTSV53_N2_P194_203.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TJ163.26 Energy conservation
spellingShingle	TJ163.26 Energy conservation Khan, Sher Afghan Alrobaian, Abdul Rahman Asad Ullah, Mohammed Rao, Ashwin Threaded spikes for bluff body base flow control
description	Although the demand for rockets and missiles has increased exponentially the problems of the gas dynamics related to these vehicles remains to be a challenge. The main problem is high-pressure associated with the shock wave in front and low-pressure recirculation bubble attached behind the vehicle at the blunt base. This barrier of wave drag due to the shock waves and the drag due to the bubble leads to a huge amount of the fuel consumption and high fluctuations in the flow field of the enlarged duct. This paper focuses mainly on the base drag and experimentally investigated the effect of the passive control in the form of the threaded spikes for bluff bodies as the base flow controller. Two threaded spikes of length 40 mm opposite to each other and attached to a control plate of diameter 80 mm and thickness 1 mm is at pitch circle diameter of 23 mm and slot of 10 mm X 10 mm at the center, placed between the nozzle and the duct to act as the passive controller. The Mach numbers considered for the investigation in the subsonic regime were 0.6, 0.7 and in the transonic regime were 0.8, 0.9 for the enlarged duct cross-sectional area of 625 mm 2 and the exit area of the nozzle considered were 100 mm2. The lengths of the enlarged duct were 100 mm, 150 mm and 200 mm. The passive control and regulating the base pressure by threaded spikes were found very efficient without any adverse effect on the flow field of the enlarged duct.
format	Article
author	Khan, Sher Afghan Alrobaian, Abdul Rahman Asad Ullah, Mohammed Rao, Ashwin
author_facet	Khan, Sher Afghan Alrobaian, Abdul Rahman Asad Ullah, Mohammed Rao, Ashwin
author_sort	Khan, Sher Afghan
title	Threaded spikes for bluff body base flow control
title_short	Threaded spikes for bluff body base flow control
title_full	Threaded spikes for bluff body base flow control
title_fullStr	Threaded spikes for bluff body base flow control
title_full_unstemmed	Threaded spikes for bluff body base flow control
title_sort	threaded spikes for bluff body base flow control
publisher	Akademi Baru
publishDate	2019
url	http://irep.iium.edu.my/69635/ http://irep.iium.edu.my/69635/ http://irep.iium.edu.my/69635/7/69635%20Threaded%20Spikes%20for%20Bluff%20Body%20Base%20Flow%20Control.pdf http://irep.iium.edu.my/69635/8/69635%20Threaded%20Spikes%20for%20Bluff%20Body%20Base%20Flow%20Control%20SCOPUS.pdf
first_indexed	2023-09-18T21:38:50Z
last_indexed	2023-09-18T21:38:50Z
_version_	1777413003117854720

Threaded spikes for bluff body base flow control

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