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目的研究燃料空气炸药近区抛散过程和燃料近区抛散速度的计算方法. 方法采用高速运动分析系统观测及建立力学模型,分析燃料空气炸药近区抛散过程. 结果得到燃料抛散最大速度的计算方法,为中、远区抛散分析奠定了基础. 结论燃料在中心药爆炸载荷作用下,首先是加速阶段,当燃料的抛速大于爆炸空腔中爆生气体流速时,燃料与空腔内爆炸气体分离,燃料抛速达到最大,加速阶段结束. 此时燃料抛掷速度是抛散的最大速度,是燃料中、远区抛散过程数值模拟的初始条件.“,”Aim To study fuel dispersion in fuel air explosive(FAE) and computational ways of fuel dispersion velocity in the near area. Methods The dispersion process of fuel in FAE was analyzed by the use of results measured with KODAK EKTAPRO EM Motion Analyzer and setting up mechanical models. Results Computational methods for fuel dispersion velocity in the acceleration stage is given and taken as a base for the study of fuel dispersion in the intermediate and the far area. Conclusion When the fuel flow velocity is higher than that of the explosion gas in the center cavity, the fuel divides with the explosion gas and its velocity of flow reaches a maximum. The acceleration stage ends at that time. The fuel dispersion velocity at this time is the initial conditions for numeral analyses of dispersion process in the intermediate and far areas.