Theoretical approach of determining expansion law of cylinder under the detonation driving of multi-component explosive

In order to provide basic data for quickly predicting JWL (Jones-Wilkins-Lee) parameters of multi-component explosive with any component ratio, this paper presents a theoretical approach for quickly determining the expansion characteristics of cylinder driven by detonation products of multi-component explosive in a cylinder test. Namely, based on the JWL parameters of each component in multi-component explosive, according to energy conservation principle and using Gurney model, the expansion displacement-time curve of cylinder under the detonation driving of multi-component explosive can be obtained. Meanwhile, utilizing energy conservation principle and the relationship between detonation velocity, detonation pressure and detonation heat from constant γ equation of state in classical detonation theory, this paper also presents a theoretical approach for determining the detonation velocity and detonation pressure of multi-component explosive with any component ratio. Using this method, the cylinder expansion characteristics, detonation velocity and detonation pressure of a PBXC03 and a PBXC10 multi-component explosive were calculated, respectively. It is found that the calculated results are in good agreement with previous experimental results, which verifies the feasibility of the theoretical approach.