Estimation of aerodynamic derivatives in pitch of a wedge in hypersonic flow
In the present paper a theory for 2-D slender bodies at high angles of attack in hypersonic flow has been developed. This theory has been applied to a sharp thick wedge with attached shock case. Using the theory a relation for a piston moving in a cylinder at any velocity and relations for stiffne...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
Department of Mechanical Engineering Saveetha School of Engineering Saveetha University
2016
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/51130/ http://irep.iium.edu.my/51130/ http://irep.iium.edu.my/51130/5/51130-new.pdf |
| Summary: | In the present paper a theory for 2-D slender bodies at high angles of attack in hypersonic flow has been
developed. This theory has been applied to a sharp thick wedge with attached shock case. Using the theory a relation for a piston
moving in a cylinder at any velocity and relations for stiffness and damping derivatives are obtained for zero incidence of the
wedge and it is found to be dependent on flight Mach number and wedge semi vertex angle. Results show that the stiffness and
damping derivatives increase with the increase in the semi vertex angle. The present method includes the thin wedge case as well,
which was covered by Lighthill piston theory, and applies only for small amplitude and low reduced frequency case. Effect of
viscosity and secondary wave reflections have been neglected. The results are obtained for wedges of different semi-vertex
angles and Mach numbers for a perfect gas. |
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