Computational and analytical investigation of aerodynamic derivatives of similitude delta wing model at hypersonic speeds

Bashir, Musavir and Khan, Sher Afghan and Azam, Qummare and Janvekar, Ayub (2017) Computational and analytical investigation of aerodynamic derivatives of similitude delta wing model at hypersonic speeds. International Journal of Technology, 8 (3). pp. 366-375. ISSN 2086-9614

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Abstract

This research paper presents a computational and analytical investigation of aerodynamic derivatives in an oscillating wedge. Unsteady hypersonic similitude has been apprehended for an oscillating wedge with an attached bow shock at a large incidence angle. The problems of instability and shock waves are generally associated with hypersonic flow and, therefore, it is imperative to evaluate aerodynamic models that can solve these problems. Lighthill’s piston theory is an unsteady aerodynamic model that is valid for an oscillating wedge with an attached shock wave. The analytical solution verifies that both the stiffness and the damping derivatives attain high values when the semi-vertex angle of the wedge is increased, while both derivatives assume lower values at increasing Mach numbers. Similarly, the pressure distribution over the wedge is evaluated to determine the details of how the developing flow cause the instabilities. Our study presents the contour plots of pressure, temperature, density, and Mach number that unravels the positions of flow separations in an oscillating wedge model.

Item Type:	Article (Journal)
Additional Information:	7395/56874
Uncontrolled Keywords:	Damping derivatives; Hypersonic flow; Piston theory; Stiffness derivatives; Wedge model
Subjects:	U Military Science > U Military Science (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof. Dr. Sher Afghan Khan
Date Deposited:	16 May 2017 20:46
Last Modified:	17 Apr 2018 11:04
URI:	http://irep.iium.edu.my/id/eprint/56874

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