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Simulation of Microscale Combustion of a Composite Rocket Propellant

Fraunhofer-Publica (Fraunhofer-Gesellschaft) 2026
Philip Emanuel Pietrek, Michael Moroff

Summary

This paper isn't actually about human health — it's a technical study on how solid rocket fuel burns at the microscopic level, looking at how factors like pressure, temperature, and the size of fuel particles affect combustion. This research is relevant to rocket engineers designing propellants, but it has no connection to microplastics or human health topics.

The pressure dependence of the burning rate of solid rocket propellants is a key parameter for their characterization and has direct implications for practical applications. Microscopic burning processes at the particle scale are essential for understanding and controlling this macroscopic burn rate and the resulting product flow and are therefore of central scientific and practical interest. Combustion behavior is strongly affected by environmental conditions such as pressure and temperature, which can be directly correlated with experimental results. The propellant composition further affects its combustion characteristics. Composite propellants typically consist of an oxidizer and a binder, combined with additives such as curing agents, plasticizers, and bonding agents. These additives primarily improve processability while exerting limited influence on combustion. The specific mass ratios of the components, together with the oxidizer particle size and shape, define a heterogeneous microstructure that governs the overall behavior of the propellant.

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