Correlation of Midweb Anomaly with Microstructure of Composite Propellant Containing High Amount of Aluminum

To investigate correlation between the orientation of sub-millimeter AP particles and the local burning rate in a propellant containing high amount of Al particles, the orientation angle data of sub-millimeter AP particles were obtain by using X-ray CT. The orientation data were compared with the local burning rate obtained in previous study. As a result, it is confirmed that if the orientation angle of the coarse AP particles against the burning direction is small, the burning rate become high. This result provides experimental evidence for the supposition that the orientation of AP particle affects the local burning rate.