Advances in Investigating Condensed-Phase Products from Boron-Based Fuel-Rich Propellants in Solid Rocket Ramjets

Boron-based fuel-rich propellants serve as a preferred energy source for solid rocket ramjets, and the combustion behavior of their condensed-phase components significantly influences engine performance. Current studies on these products are primarily divided into investigations of primary and secondary combustion products. Multi-technique analyses have been employed to examine their physicochemical properties, with key influencing parameters such as combustion pressure and spatial distribution being explored. Future work should focus on developing advanced diagnostic techniques, covering a wider range of experimental conditions, and establishing a “micro-meso-macro” multi-scale correlation mechanism using condensed-phase products as the “bridge”.