Funding source: Croatian Science Foundation
Project leader: Muhamed Sućeska
Duration: 01.01.2020 - 31.12.2023
Budget: 882.000,00 HKN
Call for project proposals: IP-2019-04-1618
Detonation parameters of most military explosives can be reliably determined using Chapman-Jouguet and Zeldovich-von Neumann-Doering hydrodynamical detonation theory. On the other hand, behaviour of commercial explosives shows a significant deviation from mentioned theories. Namely, significantly longer duration time of chemical reactions which characterizes these types of explosives causes a wider chemical reaction zone, which in turn results in a more significant radial expansion. All of this in turn results in a lower detonation velocity compared to a theoretically calculated value, as well as a strong dependence of detonation parameters to charge radius and existence and characteristics of confinement. This type of detonation (so called “non-ideal detonation”) represents a complex interdisciplinary problem usually described by Euler’s flow equations supplemented with reaction rate equations and equations of state of products and unreacted explosive. Several models of non-ideal detonation have been proposed, but considering the complexity of the problem, widely accepted, accurate and reliable enough model applicable on commercial explosive still does not exist.
The main goal of this research is to develop an improved model of non-ideal detonation based on Wood and Kirkwood’s slightly divergent flow detonation theory, coupled with thermochemical computer code. Main research objectives are a) collect a sufficient number of experimental data on detonation performance of commercial explosives as well as parameters that effect detonation characteristics, b) develop an improved reaction rate model and c) develop a confinement model to describe the effect of confinement of detonation parameters. This research will contribute to a better understanding of non-ideal detonation phenomena, especially processes in chemical reaction zone and the effects of individual parameters on detonation characteristics. In addition, part of the plan is to develop a computer tool that would enable more reliable prediction of work capacity of commercial explosives and contribute to better understanding of a explosive/rock interaction, as well as help in selection of explosive for a specific geotechnical purpose.
Project leader Professor Muhamed SućeskaFaculty of mining, geology and petroleum engineering, University of Zagreb, Croatia
Professor Mario Dobrilović, Faculty of mining, geology and petroleum engineering, University of Zagreb, Croatia
Assistant professor Vječislav Bohanek, Faculty of mining, geology and petroleum engineering, University of Zagreb, Croatia
Assistant professor Vinko Škrlec, Faculty of mining, geology and petroleum engineering, University of Zagreb, Croatia
Researcher Siniša Stanković, Faculty of mining, geology and petroleum engineering, University of Zagreb, Croatia
Assistant Barbara Štimac, Faculty of mining, geology and petroleum engineering, University of Zagreb, Croatia
Google Scholar: https://scholar.google.com/citations?user=0Qp51YUAAAAJ&hl=en&oi=ao
Professor Martin Braithwaite, Cambridge University, Cambridge, UK
Professor Thomas Klapotke, Ludwig-Maximillian University, Munich, Gewrmany
Dr Miloslav Krupka, OZM Research, Pardubice, Czech Republic
Dr Chan Hay Yee, Serene, Nanyang Technological University, Singapore
- Štimac, Barbara; Bohanek, Vječislav; Dobrilović, Mario; Sućeska, Muhamed, Prediction of Gurney velocity based on EXPLO5 code calculation results // Proceedings of the 23rd Seminar on New Trends in Research of Energetic Materials Pardubice, Czech Republic, 2020. pp. 693-704 (poster, full paper, scholarly) (https://www.bib.irb.hr/1062069)
- Štimac, Barbara; Hay Yee Serene Chan, Kunzel, Martin; Sućeska, Muhamed, Numerical Modelling of Detonation Reaction Zone of Nitromethane by EXPLO5 and Wood and Kirkwood Theory // Central European Journal of Energetic Materials, 2020, 17(2); 239-261; DOI 10.22211/cejem/124193
- Barbara Štimac participated on the 20th and 21st of February in Meeting of young chemical engineers, organised by Faculty of Chemical Engineering and Technology, University of Zagreb, Croatia, where she presented a work titled „Different effects on concentrations of harmful gaseous products during detonation of ANFO explosive “.
- In a span of three field days, from 3rd to 14th of July 2020 on a location Ljubešćica, first field measurements of ANFO explosive were obtained as a part of NEIDEMO project. Measurements were done on around 20 explosive charges with PVC confinement. Charge diameters were in a range from 50 mm to 160 mm and the goal of field measurements was determination of charge radius effect on detonation velocity and stabilization of detonation processes. Obtained results will be of great importance for calibration of parameters in non-ideal detonation model that are being developed as a part of this project.