Stability derivatives of a oscillating wedges in viscous hypersonic flow

Shanbhag, Pavitra and S., Lavanya and Khan, Sher Afghan (2018) Stability derivatives of a oscillating wedges in viscous hypersonic flow. In: 1st International Conference on Aerospace and Mechanical Engineering (AeroMech 2017), 21st-22nd Nov. 2017, Pulau Pinang.

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Abstract

In this paper an oscillating wedge has been considered, and the fluid slabs are kept at 900 to the wedge surface. The solutions of the continuity, momentum,and energy equations are obtained. By using the Rankine-Hugoniot relations for shockwaves, we can find the conditions behind the shock.This theory is unsteady one because of the consideration of effect of secondary wave reflections.Solutions are obtained for hypersonic flow over the wedge by varying different wedge semi vertex angles.These results shows extremely good consistency with Hui's predictions. When the effects of unsteadiness are considered then there is considerable change in the magnitude of the damping derivatives near the leading edge or initial 40 percent of the pivot positions and this difference is only marginal when we further down towards the trailing edge. However, this effect of unsteadiness is not visible in case of the stiffness derivatives. It is observed that the stiffness derivative increases with the increase in the wedge angle due to the increase in the plan form area of the wedge, resulting in the variation in the surface pressure distribution of the wedge. Further, due to the increment in the wedge angle the centre of pressure shifts towards the trailing edge. © Published under licence by IOP Publishing Ltd.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	7395/65258
Uncontrolled Keywords:	Hypersonic flow, Stiffness
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ163.13 Power resources
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof. Dr. Sher Afghan Khan
Date Deposited:	30 Jul 2018 11:31
Last Modified:	30 Jul 2018 11:31
URI:	http://irep.iium.edu.my/id/eprint/65258

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