Study On The Physical Stability Of Solid-liquid Mixed Fuel Air Explosive

The FAE weapons play a special role in the current conventional weapon equipment,and the fuel is the core of FAE weapons.The physical stability of the FAE affects the performance of FAE weapons.Under the conditions of long-term storage,transportation and launching,the physical state of the solid-liquid FAE will change a certain amount,affecting the performance of the FAE weapons.Therefore,it is very important to study the physical stability of the solid-liquid FAE.In this paper,the vibration experiment is used to study the variation of the physical stability of the solid-liquid mixed FAE under vibration load.(1)The vibration experiments are carried out at vibration frequencies of 10 Hz,20Hz,35 Hz and 50 Hz respectively.It is found that the mixed fuel precipitation increases with the increase of vibration frequency when the volume fraction of aluminum powder is 20%,and the maximum precipitation amount is 3.75 ml.When the volume fraction of aluminum powder is 26%,the density of the mixed fuel decreases with the increase of vibration frequency,and the variation of fuel density with height is obtained.(2)The vibration experiments are carried out under the amplitude of 1mm,2mm and 3mm respectively.It is found that the amplitude of 3mm has the greatest influence on the physical stability of the mixed fuel at these three amplitudes.(3)The influence of the components is studied by selecting five kinds of linear alkanes(n-pentane,n-hexane,n-heptane,n-octane and n-decane)as the liquid component,and flake aluminum powder as the solid component.The results show that in terms of physical stability,the order of the five liquid components is n-decane> n-hexane> n-pentane>n-heptane> n-octane,when the volume fraction of aluminum powder is 22%.(4)Change the volume fraction of aluminum powder to study the effect of proportioning,the results show that the saturation state range of aluminum-n-pentane,aluminum-n-hexane,and aluminum-n-decane mixed fuel is 20% <powder volume fraction ?22%,the saturation state range of aluminum-n-heptane mixed fuel is 20% <aluminum powder volume fraction<24%.In this paper,the FLUENT Euler model and moving grid model are used to simulate the density variation of solid-liquid mixed fuel.The vibration conditions are 50 Hz and3mm.The mixed components are aluminum powder and n-pentane.The volume content of aluminum powder is 22%.The simulation results are in good agreement with the experimental results,which proves the feasibility and rationality of the simulation scheme.The influence of vibration time and aluminum particle size on the physical stability of the FAE is studied by using this simulation scheme.It is found that the vibration time has little effect on the mixture fuel while the particle size of aluminum powder has a great influence on the physical stability of the mixture fuel.Aluminum powder with a particle size of less than 1?m as the solid component helps to maintain the physical stability of the FAE.