Реферат: Explosion welding of large-scale bimetallic plates remains a major unresolved challenge in the nuclear industry, petrochemical engineering, power generation, shipbuilding, and other sectors, mainly owing to the increased formation of melted regions and structural inhomogeneities that reduce joint strength. These issues are associated with cumulative and shock-wave processes occurring in the gap between the plates before collision. As the plate dimensions increase, both the exposure time of the plate surfaces to the high-temperature shock-compressed gas (SCG) formed in the gap and the amount of dispersed metal particles injected into the gap through cumulative effects become more significant, thereby affecting the SCG parameters. In this study, low-inertia thermoresistive sensors (RTDs) with high spatial resolution were used to measure high-intensity heat fluxes generated by the two-phase flow of gas saturated with dispersed metal particles during explosion welding of copper and steel plates under a wide range of conditions, including variations in plate dimensions and welding regimes (with and without cumulative jet formation). The results show that cumulative processes associated with the high-velocity flow of dispersed metal particles in the gap determine the nonuniform distribution of heat flux along the SCG region. Maximum values (up to 5 GW/m2) are reached near the collision point, the flux stabilizes at approximately 0.1 GW/m2 in the central region, and increases to approximately 0.7 GW/m2 at the shock-wave front. Despite the asymmetry of the cumulative particle flow across the gap height, the thermal effect of the SCG on the flyer and base plates was found to be the same. A twofold increase in plate length (from 0.28 to 0.55 m) leads to a fourfold increase in the heat flux in the central part of the SCG region (from 0.04 to 0.16 GW/m2). The novelty of this research lies in the fact that, for the first time, a dual influence of cumulative effects has been identified: the particles cool the SCG, reducing the heat flux compared to the regime without cumulative jet formation, while the additional momentum transfer from the particles to the gas accelerates the shock wave front (from 1.09 to 1.3–1.4 Vc) and prolongs the duration of thermal exposure.

Библиографическая ссылка: Khaustov S.V. , Pai V.V. , Lysak V.I. , Kuz'min S.V. , Kochkalov A.D.
Influence of cumulative effects on shock wave and thermal processes in the gap between plates during explosive welding
International Journal of Thermal Sciences. 2026. V.231. 111290 :1-70. DOI: 10.1016/j.ijthermalsci.2026.111290 WOS Scopus OpenAlex

Даты:

Опубликована online:

20 мая 2026 г.

Идентификаторы БД:

≡ Web of science:	WOS:001864893200001
≡ Scopus:	2-s2.0-105048452383
≡ OpenAlex:	W7161741133

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