Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method

n most of the engineering problems, the sudden expansion at the base is encountered in automobile industries, at the base of the fuselage of the aircraft, at the base of the artillery shells, at the base of the unguided rockets and missiles. At transonic Mach numbers, the contribution of the base d...

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Main Authors:	Aabid, Abdul, Chaudhary, Zakir Ilahi, Khan, Sher Afghan
Format:	Article
Language:	English
Published:	Penerbit Akademia Baru 2019
Subjects:	TL1 Motor vehicles
Online Access:	http://irep.iium.edu.my/76171/ http://irep.iium.edu.my/76171/ http://irep.iium.edu.my/76171/1/ARFMTSV63_N1_P34_51.pdf

id	iium-76171
recordtype	eprints
spelling	iium-761712019-11-13T08:05:37Z http://irep.iium.edu.my/76171/ Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method Aabid, Abdul Chaudhary, Zakir Ilahi Khan, Sher Afghan TL1 Motor vehicles n most of the engineering problems, the sudden expansion at the base is encountered in automobile industries, at the base of the fuselage of the aircraft, at the base of the artillery shells, at the base of the unguided rockets and missiles. At transonic Mach numbers, the contribution of the base drag is more than sixty percent. Hence it is mandatory on the part of the researcher to control the base pressure, depending upon the situation. For external aerodynamics, the base pressure should be closed to the ambient pressure to make base drag almost zero. However, for combustion chambers, the base pressure should be very low so that fuel-air mixing is so that the combustor is efficient. With this idea in mind, this study was undertaken. A finite element (FE) the method has been used to investigate the effectiveness of the microjets on wall pressure distribution in a convergent-divergent (CD) nozzle with sudden expansion. For control of the base pressure, four microjets of 1 mm orifice diameter placed at 90- degree intervals along a pitch circle distance (PCD) of 1.3 in the base region were used as a control mechanism. The variables considered are the Mach number, area ratio, and length-to-diameter ratio (L/D) as 2.2, 2.56, and 8. The simulation was done for nozzle pressure ratio (NPR) 3, 5, 7, 9, and 11 with and without the presence of the microjets. The current results for all the cases of this study indicate that one can identify the Mach number, NPR, and the L/D, which will result in a maximum increase in the pressure. Moreover, the results also proved that the influence of microjet control does not affect the flow field in the duct adversely. The two-dimensional planar CD nozzle with sudden expansion duct has been modeled, and analyses using the K-ε turbulence model independently checked with the ANSYS tool. Penerbit Akademia Baru 2019-11-10 Article PeerReviewed application/pdf en http://irep.iium.edu.my/76171/1/ARFMTSV63_N1_P34_51.pdf Aabid, Abdul and Chaudhary, Zakir Ilahi and Khan, Sher Afghan (2019) Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 63 (1). pp. 34-51. ISSN 2289-7879 E-ISSN 2289-7879 http://www.akademiabaru.com/doc/ARFMTSV63_N1_P34_51.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TL1 Motor vehicles
spellingShingle	TL1 Motor vehicles Aabid, Abdul Chaudhary, Zakir Ilahi Khan, Sher Afghan Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method
description	n most of the engineering problems, the sudden expansion at the base is encountered in automobile industries, at the base of the fuselage of the aircraft, at the base of the artillery shells, at the base of the unguided rockets and missiles. At transonic Mach numbers, the contribution of the base drag is more than sixty percent. Hence it is mandatory on the part of the researcher to control the base pressure, depending upon the situation. For external aerodynamics, the base pressure should be closed to the ambient pressure to make base drag almost zero. However, for combustion chambers, the base pressure should be very low so that fuel-air mixing is so that the combustor is efficient. With this idea in mind, this study was undertaken. A finite element (FE) the method has been used to investigate the effectiveness of the microjets on wall pressure distribution in a convergent-divergent (CD) nozzle with sudden expansion. For control of the base pressure, four microjets of 1 mm orifice diameter placed at 90- degree intervals along a pitch circle distance (PCD) of 1.3 in the base region were used as a control mechanism. The variables considered are the Mach number, area ratio, and length-to-diameter ratio (L/D) as 2.2, 2.56, and 8. The simulation was done for nozzle pressure ratio (NPR) 3, 5, 7, 9, and 11 with and without the presence of the microjets. The current results for all the cases of this study indicate that one can identify the Mach number, NPR, and the L/D, which will result in a maximum increase in the pressure. Moreover, the results also proved that the influence of microjet control does not affect the flow field in the duct adversely. The two-dimensional planar CD nozzle with sudden expansion duct has been modeled, and analyses using the K-ε turbulence model independently checked with the ANSYS tool.
format	Article
author	Aabid, Abdul Chaudhary, Zakir Ilahi Khan, Sher Afghan
author_facet	Aabid, Abdul Chaudhary, Zakir Ilahi Khan, Sher Afghan
author_sort	Aabid, Abdul
title	Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method
title_short	Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method
title_full	Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method
title_fullStr	Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method
title_full_unstemmed	Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method
title_sort	modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method
publisher	Penerbit Akademia Baru
publishDate	2019
url	http://irep.iium.edu.my/76171/ http://irep.iium.edu.my/76171/ http://irep.iium.edu.my/76171/1/ARFMTSV63_N1_P34_51.pdf
first_indexed	2023-09-18T21:47:40Z
last_indexed	2023-09-18T21:47:40Z
_version_	1777413559098015744

Modeling and analysis of convergent divergent nozzle with sudden expansion duct using finite element method

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