Formation of a Converging Detonation Wave with Reverse Front Curvature

Sultanov, V. G.; Dudin, S. V.; Sosikov, V. A.; Torunov, S. I.; Vasilyunok, E. V.; Razmyslov, A. V.; Rapota, D. Yu.

doi:10.1134/s0010508223040159

Combust Explos Shock Waves

2023

DOI: 10.1134/s0010508223040159

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Formation of a Converging Detonation Wave with Reverse Front Curvature

V. G. Sultanov,

S. V. Dudin,

V. A. Sosikov

et al.

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2024

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Asymmetry of imploding detonations in thin channels

Rodriguez Rosero,

Loiseau,

Higgins

2024

Shock Waves

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The factors that influence the symmetry of an imploding detonation are investigated experimentally and theoretically. Detonations in sub-atmospheric acetylene-oxygen were initiated and made to converge in an apparatus that followed that of Lee and Lee (Phys. Fluids 8:2148-2152(1965). The width of the test section was controlled with a wave-shaping insert, which formed the test section against the viewing window, creating an effectively two-dimensional problem with a channel width comparable to the detonation cell size. The convergence of the detonation was observed via self-luminous open-shutter photography and high-speed videography. The resulting videos were analyzed to quantify the wave speed, degree of asymmetry, and direction and magnitude of the offset in the center of convergence. To determine the experimental parameters that influence the symmetry of the imploding wave, the wave-shaping insert was intentionally canted by 0.3-0.6°, accentuating the asymmetry of the imploding detonation. The experiment was modeled using a Huygens construction wherein the detonation is treated as a collection of wavelets, each assumed to propagate locally at a velocity determined by the channel width. The results of the model reproduced the observed offsets in detonation convergence from the center of the apparatus, confirming that velocity deficits resulting from the narrow channel width control the observed asymmetry.

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Asymmetry of imploding detonations in thin channels

Rodriguez Rosero,

Loiseau,

Higgins

2024

Shock Waves

View full text Add to dashboard Cite

show abstract

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Formation of a Converging Detonation Wave with Reverse Front Curvature

Cited by 1 publication

References 10 publications

Asymmetry of imploding detonations in thin channels

Asymmetry of imploding detonations in thin channels

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