In this study, aiming at the issues of the gas-solid two-phase flow phenomena, which are accompanied with shock waves and under the condition of dense solid phase composed of micron particles, and acceleration performance of particles, a series of experiments were conducted to investigate the influence of the key parameters including type of tail nozzles, mean diameter of particles, shock Mach number and loading ratio of particles. In these experiments, a composite setup that was combined by end-to-end connection of a horizontal shock tube, a constant-section straight tube, a particle loading room and a tail nozzle, was employed, as well as the dynamic pressure measurement and high-speed photography were. It can be summarized, firstly, that in event of dense particle phase, the priority of acceleration performance of particles in different types of tail nozzles could be the first in a divergent nozzle, and then in a convergent nozzle, and the last in a convergent-divergent one, this is of difference from that under the condition of dilute particle phase. Therefore, it should be taken into account that the influence of possible attenuation of an incident shock wave, agglomeration of particles, friction force of nozzle wall and blockage of particles on the acceleration performance of particles. Secondly, greater diameter of particles corresponds to a better acceleration effect, implying that the effect of agglomeration of particles should be considered for the evaluation of drag force other than the diameter of a single particle should. Thirdly, the acceleration performance of particles is better for a larger shock Mach number. Finally, acceleration performance of particles in a convergent nozzle decreases as the increase of loading ratio, however, no response of acceleration performance of particles could happen to a further increase of loading ratio after loading ratio reaches a certain value.
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