Progress in non-shock ignition performance of solid propellants with microscopic defects
Solid propellants containing microscopic defects(microcracks and micropores)may be subject to accidental detonation when loaded by low-pressure and long-pulse,which seriously affects the safety of solid propellants.Starting from the ignition mechanism of solid propellants,the observation experiments and characterization methods of microscopic defects in solid propellants and the non-shock ignition tests are reviewed;the relevant research means and results of numerical simulation of non-shock ignition of solid propellants containing microscopic defects are sorted out;and based on the types of microscopic defects in solid propellants,the influence of microscopic defects on the non-shock ignition performance of solid propellants is systematically summed up,and the effect of the non-shock ignition performance on the non-shock ignition performance of solid propellants containing microscopic defects is summarized.Numerical simulation study of non-shock ignition performance of solid propellant with fine defects and the development of test equipment for non-shock ignition are also prospected.
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