Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio

In this work we estimate stiffness derivatives for an oscillating non-slender axi-symmetric cone in pitch at Mach number greater than five. Results indicate that there is continous decrease in the stiffness derivative with the rise in the semi vertex angle for all the Mach number. The variation in t...

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Main Authors:	Shabana, Aysha, Monis, Renita Sharon, Crasta, Asha, Khan, Sher Afghan
Format:	Article
Language:	English
Published:	Science Publishing CorporationPublisher of International Academic Journals 2018
Subjects:	V Naval Science (General)
Online Access:	http://irep.iium.edu.my/66197/ http://irep.iium.edu.my/66197/ http://irep.iium.edu.my/66197/ http://irep.iium.edu.my/66197/1/66197_Effect%20of%20semi%20vertex%20angle.pdf

id	iium-66197
recordtype	eprints
spelling	iium-661972018-10-02T06:17:16Z http://irep.iium.edu.my/66197/ Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio Shabana, Aysha Monis, Renita Sharon Crasta, Asha Khan, Sher Afghan V Naval Science (General) In this work we estimate stiffness derivatives for an oscillating non-slender axi-symmetric cone in pitch at Mach number greater than five. Results indicate that there is continous decrease in the stiffness derivative with the rise in the semi vertex angle for all the Mach number. The variation in the stiffness derivative is only visible for Mach numbers in the range from 5 to 7 for specific heat ratio of 1.67. For Mach number greater than 9 the stiffness derivative becomes independent of the geometrical parameter of the cone. The stiffness derivative becomes independent with the semi vertex angle for Mach 9 and above. Only at Mach 5 the variation of the stiffness derivative is distinct as at this Mach number the flow is in the transition zone from supersonic to hypersonic. The damping derivatives for h = 0, 0.2, 0.4, and 0.6 have similar trends, where the magnitude of the damping derivatives is decreasing with Mach number as well as with the semi vertex angle. However, the damping derivatives behave differently for h = 0.8 and 1.0 there is non-linear decrement in the magnitude of the damping derivatives, achieves minima, then again there sudden increase in the magnitude. Although this study is for sharp edged cone with attached shock wave case, once theory is developed it can easily extended for most practical cases with detached cases where nose bluntness will play an important role to tackle the aerodynamic heating. Science Publishing CorporationPublisher of International Academic Journals 2018-08 Article PeerReviewed application/pdf en http://irep.iium.edu.my/66197/1/66197_Effect%20of%20semi%20vertex%20angle.pdf Shabana, Aysha and Monis, Renita Sharon and Crasta, Asha and Khan, Sher Afghan (2018) Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio. International journal of Engineering & Technology, 7 (3.29). pp. 386-390. ISSN 2227-524X https://www.sciencepubco.com/index.php/ijet/article/view/19199/0 10.14419/ijet.v7i3.29.19199
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	V Naval Science (General)
spellingShingle	V Naval Science (General) Shabana, Aysha Monis, Renita Sharon Crasta, Asha Khan, Sher Afghan Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio
description	In this work we estimate stiffness derivatives for an oscillating non-slender axi-symmetric cone in pitch at Mach number greater than five. Results indicate that there is continous decrease in the stiffness derivative with the rise in the semi vertex angle for all the Mach number. The variation in the stiffness derivative is only visible for Mach numbers in the range from 5 to 7 for specific heat ratio of 1.67. For Mach number greater than 9 the stiffness derivative becomes independent of the geometrical parameter of the cone. The stiffness derivative becomes independent with the semi vertex angle for Mach 9 and above. Only at Mach 5 the variation of the stiffness derivative is distinct as at this Mach number the flow is in the transition zone from supersonic to hypersonic. The damping derivatives for h = 0, 0.2, 0.4, and 0.6 have similar trends, where the magnitude of the damping derivatives is decreasing with Mach number as well as with the semi vertex angle. However, the damping derivatives behave differently for h = 0.8 and 1.0 there is non-linear decrement in the magnitude of the damping derivatives, achieves minima, then again there sudden increase in the magnitude. Although this study is for sharp edged cone with attached shock wave case, once theory is developed it can easily extended for most practical cases with detached cases where nose bluntness will play an important role to tackle the aerodynamic heating.
format	Article
author	Shabana, Aysha Monis, Renita Sharon Crasta, Asha Khan, Sher Afghan
author_facet	Shabana, Aysha Monis, Renita Sharon Crasta, Asha Khan, Sher Afghan
author_sort	Shabana, Aysha
title	Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio
title_short	Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio
title_full	Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio
title_fullStr	Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio
title_full_unstemmed	Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio
title_sort	effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio
publisher	Science Publishing CorporationPublisher of International Academic Journals
publishDate	2018
url	http://irep.iium.edu.my/66197/ http://irep.iium.edu.my/66197/ http://irep.iium.edu.my/66197/ http://irep.iium.edu.my/66197/1/66197_Effect%20of%20semi%20vertex%20angle.pdf
first_indexed	2023-09-18T21:33:56Z
last_indexed	2023-09-18T21:33:56Z
_version_	1777412695007428608

Effect of semi vertex angle on stability derivatives for an oscillating cone for constant value of specific heat ratio

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