Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments

Experimental investigations are carried out to study the control of base pressure without and with the use of micro-jets through suddenly expanded axi-symmetric passage in the supersonic regime. Four micro jets having an orifice diameter of 1mm were located at 90◦ intervals. In the base area, act...

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Main Authors:	Quadros, Jaimon Dennis, Khan, Sher Afghan, Antony, A J
Format:	Article
Language:	English English
Published:	Technical University of Lodz 2018
Subjects:	TL780 Rockets
Online Access:	http://irep.iium.edu.my/71236/ http://irep.iium.edu.my/71236/ http://irep.iium.edu.my/71236/1/71236_Base%20Pressure%20Behaviour%20in%20a%20Suddenly.pdf http://irep.iium.edu.my/71236/7/71236_Base%20pressure%20behaviour%20in%20a%20suddenly%20expanded%20_scopus.pdf

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spelling	iium-712362019-07-12T04:12:08Z http://irep.iium.edu.my/71236/ Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments Quadros, Jaimon Dennis Khan, Sher Afghan Antony, A J TL780 Rockets Experimental investigations are carried out to study the control of base pressure without and with the use of micro-jets through suddenly expanded axi-symmetric passage in the supersonic regime. Four micro jets having an orifice diameter of 1mm were located at 90◦ intervals. In the base area, active controls jets have been placed on a pitch of a circle diameter that is 1.3 times the exit diameter of the nozzle. The jets were dispensed abruptly into the axi-symmetric tube maintained at a cross-sectional area of 4.84 times the exit nozzle area. The variation of base pressure as a function of flow control parameters namely Mach number, nozzle pressure ratio (NPR) and length to diameter) ratio (L/D) are evaluated experimentally. This study also assesses the impact of flow control variables on base pressure for two cases viz. with control and without control respectively. An L9 orthogonal array of Taguchi and the analysis of variance were employed to investigate the percentage of contribution of these parameters and their interactions affecting the base pressure. The correlations between the various factors affecting the base pressure were obtained by using multiple linear regression equations. Confirmation tests were conducted in order to test the developed linear regression equations for their practical significance. Both the regression models were found to be significant and reliable with a percentage deviation lying in the range of −6.12% to 10.26% for base pressure without control and −13.92% to 6.58% for base pressure with control. Analysis of variance was also performed in order to determine the statistical significance of each parameter on the total variability of base pressure. The study concluded that Mach number is the most influential parameter affecting base pressure followed by NPR and L/D. Technical University of Lodz 2018-12-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/71236/1/71236_Base%20Pressure%20Behaviour%20in%20a%20Suddenly.pdf application/pdf en http://irep.iium.edu.my/71236/7/71236_Base%20pressure%20behaviour%20in%20a%20suddenly%20expanded%20_scopus.pdf Quadros, Jaimon Dennis and Khan, Sher Afghan and Antony, A J (2018) Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments. Mechanics and Mechanical Engineering, 22 (4). pp. 1077-1097. ISSN 1428-1511 E-ISSN 2354-0192 http://kdm.p.lodz.pl/articles/2018/4/22-4-22-Quadros.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TL780 Rockets
spellingShingle	TL780 Rockets Quadros, Jaimon Dennis Khan, Sher Afghan Antony, A J Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments
description	Experimental investigations are carried out to study the control of base pressure without and with the use of micro-jets through suddenly expanded axi-symmetric passage in the supersonic regime. Four micro jets having an orifice diameter of 1mm were located at 90◦ intervals. In the base area, active controls jets have been placed on a pitch of a circle diameter that is 1.3 times the exit diameter of the nozzle. The jets were dispensed abruptly into the axi-symmetric tube maintained at a cross-sectional area of 4.84 times the exit nozzle area. The variation of base pressure as a function of flow control parameters namely Mach number, nozzle pressure ratio (NPR) and length to diameter) ratio (L/D) are evaluated experimentally. This study also assesses the impact of flow control variables on base pressure for two cases viz. with control and without control respectively. An L9 orthogonal array of Taguchi and the analysis of variance were employed to investigate the percentage of contribution of these parameters and their interactions affecting the base pressure. The correlations between the various factors affecting the base pressure were obtained by using multiple linear regression equations. Confirmation tests were conducted in order to test the developed linear regression equations for their practical significance. Both the regression models were found to be significant and reliable with a percentage deviation lying in the range of −6.12% to 10.26% for base pressure without control and −13.92% to 6.58% for base pressure with control. Analysis of variance was also performed in order to determine the statistical significance of each parameter on the total variability of base pressure. The study concluded that Mach number is the most influential parameter affecting base pressure followed by NPR and L/D.
format	Article
author	Quadros, Jaimon Dennis Khan, Sher Afghan Antony, A J
author_facet	Quadros, Jaimon Dennis Khan, Sher Afghan Antony, A J
author_sort	Quadros, Jaimon Dennis
title	Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments
title_short	Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments
title_full	Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments
title_fullStr	Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments
title_full_unstemmed	Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments
title_sort	base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using taguchi design of experiments
publisher	Technical University of Lodz
publishDate	2018
url	http://irep.iium.edu.my/71236/ http://irep.iium.edu.my/71236/ http://irep.iium.edu.my/71236/1/71236_Base%20Pressure%20Behaviour%20in%20a%20Suddenly.pdf http://irep.iium.edu.my/71236/7/71236_Base%20pressure%20behaviour%20in%20a%20suddenly%20expanded%20_scopus.pdf
first_indexed	2023-09-18T21:41:07Z
last_indexed	2023-09-18T21:41:07Z
_version_	1777413146625966080

Base pressure behaviour in a suddenly expanded duct at supersonic mach number regimes using Taguchi design of experiments

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