• Vol 8, No 3 (2017)
  • Electrical, Electronics, and Computer Engineering

Computational and Analytical Investigation of Aerodynamic Derivatives of Similitude Delta Wing Model at Hypersonic Speeds

Musayir Bashir, S.A. Khan, Qummare Azam, Ayub Ahmed Janvekar


Publish at : 29 Apr 2017 - 00:00
IJtech : IJtech Vol 8, No 3 (2017)
DOI : https://doi.org/10.14716/ijtech.v8i3.6319

Cite this article as:
Bashir, M., Khan, S., Azam, Q.., Janvekar, A.A., 2017. Computational and Analytical Investigation of Aerodynamic Derivatives of Similitude Delta Wing Model at Hypersonic Speeds. International Journal of Technology. Volume 8(3), pp.366-375
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Musayir Bashir School of Aerospace Engineering, University Sains Malaysia (USM)
S.A. Khan Department of Mechanical Engineering, International Islamic University Malaysia (IIUM)
Qummare Azam School of Mechanical Engineering, University Sains Malaysia (USM)
Ayub Ahmed Janvekar School of Mechanical Engineering, University Sains Malaysia (USM)
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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

Damping derivatives; Hypersonic flow; Piston theory; Stiffness derivatives; Wedge model