Univerzita PardubiceFakulta chemicko- technologická

Univerzita Pardubice

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Publikace detail

DOWNSCALING CYLEX TEST FOR OBTAINING JWL PARAMETERS

Autoři: Jirman Štěpán | Šelešovský Jakub | Pachman Jiří

Rok: 2025

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	DOWNSCALING CYLEX TEST FOR OBTAINING JWL PARAMETERS	Development of a new explosive formulations and characterization of their effects is a long and relatively expensive process in both civilian and military applications. Numerical modelling helps and to a certain degree of accuracy can provide the needed information on expansion of detonation products via thermochemical calculation. It yields EoS often in the form of JWL, later used in hydrocode for detonation effect calculation. The EoS parameters need to be validated experimentally especially for non-ideal explosives deviating from the assumption of ZND detonation. The experimental determination of the EoS parameters is done by cylinder expansion test (CYLEX), which traditionally requires relatively large amount of explosive. It has been a trend in research of energetic materials to find ways to obtain experimental parameters of tested explosive using as little amount as possible to reduce the cost. In other words, downscaling the experiments. The CYLEX test has been subjected to downscaling before, but across all dimensions. In our trials we simply tried cutting the cylinder to shorter length, keeping the diameter and wall thickness. The shortened length was found to be sufficient for the detonation to stabilize and the use of photonic doppler velocimetry (PDV) enabled us to determine the velocity time history and compare it to standard unscaled test results.	Cylinder test; CYLEX; scaling; detonation parameters; JWL parameters