Explosion Thermodynamic Model And Calculation Of Detonation Parameters Of Thermobaric Explosives

In this paper,the explosion parameters and thermodynamic processes of thermobaric explosives were studied theoretically and experimentally.This research is the theoretical basis of the design of high efficiency damage thermobaric weapons.1.The detonation velocity of 50%,60% and 70% aluminum content of the thermobaric explosives were measured.The experimental results show that:in the current loading conditions,aluminum content of not more than 70% of thermobaric explosives can charge detonation and thermobaric explosives loading formula should not exceed 80% of the amount of aluminum.The detonation velocity of 70% aluminium content of thermobaric explosives was significantly lower and not as stable as 60% aluminium content.If it is found that the higher the aluminum content,the greater the reaction heat is.Considering the detonation degree,aluminum content of about 60% may be a better choice.2.A new method for calculating the detonation velocity of CHNO and CHNOAl explosives was established.With the charge density of more than 85% of the maximum theoretical density,calculation of the detonation velocity was carried out for twenty-six kinds of mixed CHNO explosives and thirteen kinds of pure CHNO explosives and twenty-five kinds of aluminized explosives by the new method.The average relative error is less than 0.1%,the maximum relative error is less than 3%,and the correlation coefficient is more than 0.95.Through the comparative analysis of the calculation results,the new method is better than the existing Urizar formula and Kamlet formula.3.The calculation error of Urizar method for more than 50%Al content of thermobaric explosives is very large and has lost the reference value according to the experimental results of the measurements of detonation velocity of thermobaric explosives.The accuracy of new method is still considerable,so it has wider application range and can be used as calculation of detonation velocity of thermobaric explosives,and is worthy of promotion.4.A thermodynamic model for thermobaric explosives was established.The equation of state of condensed components were written in Grüneisenform.The equations of steady state detonation parameters were obtained by simplifying the condensed components.5.The detonation parameter of thermobaric explosives with different prescription were estimated by new method and thermodynamic model.It was found that the reaction degree of Al and ?_2j increased with the increase of the content of Al,while the charge density was 85.5% of the maximum theoretical density.And (?_2j)_RDX>(?_2j)_HMX at the same Al content.Under the same prescription,the greater the charge density,the greater the reaction degree of ?_2j and Al powder,and the bigger the explosion pressure.6.The equation of state of aluminum is constructed with the Morse potential,and the predicted shock wave states are in good agreement with the experimental results.Therefore,it is feasible to introduce the Morse potential as the real state equation of Al for the calculation of detonation parameters.