Study on the ultraviolet polarized radiation characteristics of solid rocket motor plumes

In recent years, with the rapid development of military combat technology worldwide, research on target detection and identification has deepened, integrating polarization characteristics with the intensity information of plumes to enhance the detection and identification performance of aerial targets from multiple dimensions. This article studies the spatial distribution characteristics of ultraviolet polarized radiation in gas-solid two-phase flow plumes through the improved Spherical Harmonic Discrete Ordinate Method (SHDOM). Adjustments were made to SHDOM to suit the complex environment of plumes, and the spatial distribution cloud diagram of Stokes parameters in solid rocket motor plumes was analyzed through simulation. Simulation results indicate that the overall spatial distribution of polarized radiation components in two-phase flow plumes is similar, but the positions of the internal peaks differ; the detection zenith angle directly impacts the distribution characteristics of polarized radiation in the plume, with all polarized radiation components in the plume increasing as the detection angle increases. These improvements and studies deepen the understanding of the polarization radiation characteristics of vehicle plumes, providing an important theoretical basis for enhancing the precision of plume detection and analysis.