A Method for Calculating the JWL Equation of State Parameters for the Detonation Products of CL-20-Based Aluminized Explosives
Xiaoxiang Mao, Yu Zheng, Fei Shen, Yinglin Wang, Xiaoming Wang, Yiming Li
Abstract
This work developed a method for calculating the Jones-Wilkins-Lee (JWL) equation of state (EOS) for the detonation products of aluminized explosives based on hexanitrohexaazaisowurtzitane (CL-20). On the basis of previous studies, chemical reaction equations, Hess’ law and Avogadro’s law were all incorporated in this process because of the non-ideal detonations of aluminized explosives. The EOS parameters were determined for explosive formulations comprising pure CL-20 as well as aluminized versions and compared to literature reports. Calculated pressure-specific volume curves were in good agreement with prior studies. A 50 mm cylinder test using a CL-20/Al/wax composition with a 75/20/5 mass ratio was conducted and the calculated EOS parameters were used to simulate the expansion of the cylinder wall. The experimental and simulation plots were found to agree within 5%, which confirms the validity of this method with regard to engineering analyses.