Naslov
Prediction of Gurney velocity based on EXPLO5 code calculation results

Autori
Štimac, Barbara ; Bohanek, Vječislav ; Dobrilović, Mario ; Sućeska, Muhamed

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 23rd Seminar on New Trends in Research of Energetic Materials / - , 2020, 693-704

Skup
New Trends in Research of Energetic Materials

Mjesto i datum
Pardubice, Češka Republika, 01.04.2020. - 03.04.2020

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Gurney velocity ; detonation energy, thermochemical code, EXPLO5

Sažetak
Output of an explosive is most commonly judged based on detonation velocity, detonation pressure and detonation heat. These parameters can be relatively easily determined experimentally or calculated by thermochemical codes. However, they do not answer the question how fast an explosive can propel surrounding metal liner. R.W. Gurney developed the model that provides the answers to this question. The Gurney’s model predicts the terminal velocity of explosively-propelled metal liner on the bases the ratio of the mass of metal to the mass of explosive and so-called Gurney velocity (√(2E_G )), which is a characteristic for a given explosive. Reliable determination of the Gurney velocity is subject of numerous studies. The Gurney velocity is commonly determined experimentally by measuring velocity of cylinder wall, in so-called copper cylinder expansion test. Alternatively, it can be estimated based on certain detonation parameters. In this paper, we have analysed the accuracy of several simple empirical methods that are commonly used to predict the Gurney velocity based on detonation velocity, detonation pressure, detonation heat or detonation energy. The detonation parameters used in the analysis are calculated by thermochemical code EXPLO5. The Gurney velocities obtained experimentally are used to calibrate parameters in the models, as well as to validate the accuracy of prediction. We found that the method based on evaluation of the Gurney velocity from the detonation energy along the expansion isentrope is superior to all empirical methods studied. This method predicts the Gurney velocity with the RMS error of 3.28%, while empirical methods predict the Gurney velocity with RMS error=4.9% - 7.8 %.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA