In the present investigation, various factors and trends, related to the usage of two or more sets of inert particles comprised of\r\nthe same material (nominally aluminum) but at different diameters for the suppression of axial shock wave development, are\r\nnumerically predicted for a composite-propellant cylindrical-grain solid rocket motor. The limit pressure wave magnitudes at a\r\nlater reference time in a given pulsed firing simulation run are collected for a series of runs at different particle sizes and loading\r\ndistributions and mapped onto corresponding attenuation trend charts. The inert particles� presence in the central core flow is\r\ndemonstrated to be an effective means of instability symptom suppression, in correlating with past experimental successes in the\r\nusage of particles. However, the predicted results of this study suggest that one needs to be careful when selecting more than one\r\nsize of particle for a given motor application.
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