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Utilising CFD in the investigation of high-speed unsteady spiked body flows

Part of: 75 year anniversary of Aeronautical Engineering at Glasgow University

Published online by Cambridge University Press:  04 July 2016

D. Feszty ,
K. J. Badcock  and
B. E. Richards
D. Feszty
Affiliation:
Department of Aerospace Engineering, University of Glasgow, UK
K. J. Badcock
Affiliation:
Department of Aerospace Engineering, University of Glasgow, UK
B. E. Richards
Affiliation:
Department of Aerospace Engineering, University of Glasgow, UK
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Abstract

Unsteady spiked body flows were simulated by a second order time-accurate CFD method. Laminar, axisymmetric flow was considered at Mach 2.21 and Mach 6 freestreams and Reynolds’ numbers based on the blunt body diameter of 0.12 million and 0.13 million, respectively. A spiked forward facing cylinder with spike lengths between LID = 1.00 and LID = 2.40 was used as the model geometry. Following the numerical method’s verification, the individual flow modes of oscillation and pulsation were examined. The frequency of the events was found in good agreement with the experiment, while the pressure amplitudes were overpredicted in the Mach 6 cases. Analysis of the numerical results showed that the oscillation flow mode was driven by a viscous mechanism, whereas the pulsation by an inviscid one. The hysteresis phenomenon in the transition between the two flow modes was predicted qualitatively.

Type
Research Article
Information
The Aeronautical Journal , Volume 106 , Issue 1058 , April 2002 , pp. 161 - 174
Copyright
Copyright © Royal Aeronautical Society 2002 

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