Abstract: The light emission from samples consisting of a transparent matrix with inclusions of hot spots was studied. The matrix material was water and epoxy resin. Hot spots were generated by shock compression of MS-V hollow glass microballoons. In the pressure range 0.7–29 GPa, a brightness decay time of 280 to 70 ns was recorded. The brightness decay time increased by more than an order of magnitude when replacing the optical window made of solid epoxy resin by LiF. However, even this increased time of brightness decay is much shorter than the estimated times of hot-spot temperature relaxation due to heat conduction in the calculation with stationary parameters (ta = 10−2 s) and due to light emission (τ = 2.4 · 10−3 s). It is concluded that the dominant mechanism of temperature relaxation is the turbulent mixing of the medium behind the shock-wave front. The experimental results show that in numerical simulations of the temperature field during shock-wave propagation through a pore, it is necessary to take into account the viscosity and strength of the matrix material

Cite: Bordzilovskii S.A. , Karakhanov S.M. , Plastinin A.V.
Relaxation of Light Emission from Hot Spots Depending on the Characteristics of the Environment
Combustion, Explosion and Shock Waves. 2023. V.59. N5. P.591-598. DOI: 10.1134/s0010508223050088 WOS Scopus РИНЦ OpenAlex

Original: Бордзиловский С.А. , Караханов С.М. , Пластинин А.В.
ОСОБЕННОСТИ РЕЛАКСАЦИИ СВЕТОВОГО ИЗЛУЧЕНИЯ ГОРЯЧИХ ТОЧЕК В ЗАВИСИМОСТИ ОТ ХАРАКТЕРИСТИК ОКРУЖАЮЩЕЙ СРЕДЫ
Физика горения и взрыва. 2023. Т.59. №5. С.63-71. DOI: 10.15372/FGV2022.9232 РИНЦ OpenAlex

Identifiers:

Web of science:	WOS:001106172200007
Scopus:	2-s2.0-85177471854
Elibrary:	64395977
OpenAlex:	W4388873274

Citing: Пока нет цитирований

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