The measured temperature and pressure of EDC37 detonation products

Abstract

Abstract. We present the experimentally determined temperature and pressure of the detonation products of EDC37; a HMX based conventional high explosive. These measurements were performed on a series of cylinder tests. The temperature measurements were undertaken at the end of the cylinder with optical fibres observing the bare explosive through a LiF window. The temperature of the products was measured for approximately 2 μs using single colour pyrometry, multicolour pyrometry and also using time integrated optical emission spectroscopy with the results from all three methods being broadly consistent. The peak temperature was found to be 3600 K dropping to 2400 K at the end of the measurement window. The spectroscopy was time integrated and showed that the emission spectra can be approximated using a grey body curve between 520 -800 nm with no emission or absorption lines being observed. The pressure was obtained using an analytical method which requires the velocity of the expanding cylinder wall and the velocity of detonation. The pressure drops from an initial CJ value of 38 GPa to 4 GPa after 2 μs.

Strategies for Achieving Balance between Detonation Performance and Crystal Stability of High-Energy-Density Materials

“…H e provides the count of the total amount of energy released by an HEDM in the reaction and can be measured by calorimetry (Kici nski and Trzci nski, 2009). T d can be measured by single-color pyrometry, multicolor pyrometry, or time-integrated optical emission spectroscopy (Ferguson et al, 2017).…”