Equation of state for detonation product gases

18th APS-SCCM; 24th AIRAPT

Nagayama, K.^1 ; Kubota, S.^2

Kyushu University, Motooka 744, Nishi-ku, Fukuoka

819-0395, Japan^1

National Institute of Advanced Industrial Science and Technology, Tsukuba

3058569, Japan^2

关键词: Approximate descriptions;    Detonation product;    Detonation velocity;    Equation of state;    Function of pressure;    Linear relationships;    Material parameter;    Pressure-volume equation of state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/19/192012/pdf
DOI  :  10.1088/1742-6596/500/19/192012

来源: IOP

【 摘 要 】

Based on the empirical linear relationship between detonation velocity and loading density, an approximate description for the Chapman-Jouguet (CJ) state for detonation product gases has been presented. Assuming that the Grüneisen parameter is a function only of volume, we obtained the Grüneisen parameter along CJ states. Thermodynamic identity between the Grüneisen parameter and another non-dimensional material parameter R used in the Rice-Walsh type equation of state introduced by Wu and Jing can be used to derive the enthalpy-pressure-volume equation of state for detonation gases. Behavior of this parameter R as a function of pressure is calculated and revealed that their change with pressure is very gradual and seems to approach a finite value with decreasing pressure. Release isentropes from CJ states of several initial density detonation of PETN is shown.