为了研究含能颗粒在固液混合燃料燃爆反应中的影响机制，使用20 L球形云雾燃爆特性试验系统，对不同质量分数含能物质的固液燃料-空气分散体系的燃爆特性进行研究。在低浓度条件下，试验测量得到爆炸压力、最大压力上升速率、反应时间及不同燃料爆炸下限，根据固液分散微粒结合方式，分析含能颗粒对固液混合燃料燃爆特性的影响。结果表明：在环三亚甲基三硝胺（1,3,5-trinitroperhy-dro-1,3,5-triazine, RDX）／铝粉混合燃料体系中，爆炸压力和最大压力上升速率随RDX质量分数的增加先增大后减小，最大值分别为1 516.17 kPa和1 16.17 kPa/ms；针对RDX／铝粉／硝基甲烷混合燃料体系，RDX的加入导致爆炸压力不断减小，降幅达到427.99 kPa，当RDX质量分数低时，RDX对混合燃料燃烧爆炸起抑制作用。同时发现混合燃料反应时间变化规律与最大压力上升速率变化规律完全相反。

In order to study the influence mechanism of energetic particles on the combustion and explosion reaction of solid-liquid mixed fuel, a 20 L spherical cloud combustion and explosion characteristics test system was used to study the combustion and explosion characteristics of solid-liquid fuel-air dispersion systems with different mass fractions of energetic substances. Under low concentration conditions, the explosion pressure, maximum pressure rise rate, reaction time and explosion lower limit of different fuels were measured. Based on the combination of solid-liquid dispersed particles, the impact of energetic particles on the combustion and explosion characteristics of solid-liquid mixed fuel was analyzed. The results show that in the 1,3,5-trinitroperhy-dro-1,3,5-triazine(RDX)/aluminum powder mixed fuel system, the explosion pressure and maximum pressure rise rate first increase and then decrease with the increase of RDX mass fraction, with the maximum values being 1 516.17 kPa and 116.17 kPa/ms respectively. For RDX/ aluminum powder/nitromethane mixed fuel system, the addition of RDX causes the explosion pressure to continuously decrease, reaching 427.99 kPa. When the RDX mass fraction is low, RDX inhibits the combustion explosion of the mixed fuel. At the same time, it was found that the change pattern of mixed fuel reaction time is completely opposite to the change pattern of maximum pressure rise rate.