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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Imprimir: 2152-5102
ISSN En Línea: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v40.i5.50
pages 420-428

The Flow Field Induced by a Blast Wave Traversing on a Convex Curved Wall

A. O. Muritala
Department of Mechanical Engineering, Obafemi Awolowo University Ile-Ife, Nigeria
C. Law
School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand Witwatersrand, South Africa
B. W. Skews
School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand Witwatersrand, South Africa
Olubunmi T. Popoola
Department of Mechanical and Materials Engineering, Florida International University, Miami, Florida 33174, USA

SINOPSIS

This work studied the flow field induced by a blast wave traversing on a circular geometry. This was with a view to explaining the transient development of the complex flow structure that is formed when there is explosion that propagates a shock wave. Tests were conducted in a large scale experimental shock tube on a 200 mm diameter wall using a range of incident shock Mach numbers between 1.4 and 1.6. Schlieren optical system was set up to capture the images of interaction and the pressure history were recorded at different locations along the curvature. The results show series of lambda-shaped shocklets that later coalesced into a second shock. A shear layer evolved from the separation point and terminated by a vortex which enlarges as the diffraction process progresses. The flow later becomes unstable with two turbulent patches identified around the separation point. The present study gives information that is very useful in designing devices for the attenuation of blast waves.


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