Research on Microscopic Ignition and Combustion Mechanism of Thin-Film Solid Propellants

To investigate the detailed combustion processes of solid propellant components near the burning surface, this study develops a microscopic ignition and combustion experimental method and establishes a corresponding test system. A high-power microscope and image sensor are employed to continuously record the ignition and combustion of thin-film solid propellants (TFSP, AP/HTPB/Al). By integrating existing theories with image processing techniques, the combustion behavior of AP, Al, and the TFSP as a whole is analyzed in detail. A refined combustion surface model is constructed based on decomposition results, offering theoretical support for ignition combustion modeling and its integration with agglomeration models. Quantitative analysis reveals that reducing AP particle size in TFSP significantly enhances burning rate and combustion surface irregularity. This approach enables the observation of finer combustion behaviors and provides a novel perspective for solid propellant ignition and combustion research.