Detonation wave reflection over a concave–convex cylindrical wedge

The transition between Mach reflection (MR) and regular reflection (RR) of gaseous detonations in argon-diluted stoichiometric hydrogen–oxygen was investigated experimentally using a wedge with a concave–convex surface. The continuous MR triple-point trajectory was recorded using the smoked foil tec...

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Bibliographic Details
Published in:Shock waves 2024-06, Vol.34 (3), p.285-289
Main Authors: Wang, L. Q., Ma, H. H.
Format: Article
Language:English
Subjects:
Acoustics
Angle of reflection
Argon
Condensed Matter Physics
Cylindrical waves
Detonation waves
Engineering
Engineering Fluid Dynamics
Engineering Thermodynamics
Fluid- and Aerodynamics
Heat and Mass Transfer
Mach reflection
Shock wave reflection
Technical Note
Thermodynamics
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Summary:The transition between Mach reflection (MR) and regular reflection (RR) of gaseous detonations in argon-diluted stoichiometric hydrogen–oxygen was investigated experimentally using a wedge with a concave–convex surface. The continuous MR triple-point trajectory was recorded using the smoked foil technique, from which the transition angles for MR ↔ RR transitions could be determined. Similar to the reflection of a non-reacting shock wave, the non-stationary hysteresis phenomenon was found for detonation reflection, i.e., the MR → RR transition angle was much larger than that for RR → MR transition. In addition, the RR → MR transition angle on the convex surface was smaller than that for detonation reflection over a single half-cylinder. This is opposite to what is found for non-reacting shock wave reflection.
ISSN:0938-1287
1432-2153
DOI:10.1007/s00193-024-01176-3