Abstract: The detonation of acetylene–oxygen mixtures diluted with helium or argon is studied in an extended channel with a flow-through supply of explosive mixture components at atmospheric pressure. The steady detonation velocity and the temperature and dynamic pressure of the products were calculated. The limits of existence of self-sustaining detonation in a channel with a diameter of 26 mm are determined for equimolar and stoichiometric mixtures diluted to 92% with both helium and argon. Near the limits, near-spin detonation is initiated without a noticeable deflagration-to-detonation transition by a booster charge of an equimolar acetylene–oxygen mixture, whose volume does not exceed 180 cm3 or 13 channel diameters. Detonation coatings made of pure titanium were obtained using both helium and argon as a purge gas. The use of helium leads to the formation of a dense coating with porosity <0.5% and a microhardness of 370 HV300. Argon enables the production of coatings with a developed surface area and high (tens of percent) porosity in the surface layer, which have potential applications in catalytic reactors and in medical implant manufacturing.

Cite: D. K. Rybin , V. Yu. Ulianitsky , I. S. Batraev
Gaseous Detonation of Acetylene–Oxygen Mixtures Diluted with Argon or Helium and Their Application in Detonation Spraying
Combustion, Explosion and Shock Waves. 2026. V.62. N3. P.399-409. DOI: 10.1134/s0010508226700334 WOS Scopus OpenAlex

Original: Рыбин Д.К. , Батраев И.С. , Ульяницкий В.Ю.
Исследование газовой детонации ацетиленокислородных смесей, разбавляемых аргоном или гелием, и их применение в детонационном напылении
Физика горения и взрыва. 2026. Т.62. №3. DOI: 10.15372/FGV2025.9557 OpenAlex

Identifiers:

≡ Web of science:	WOS:001830369300002
≡ Scopus:	2-s2.0-105045341419
≡ OpenAlex:	W7170163935

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