Gelled propellants are produced from liquid fuels and gelling agents. Once in a tank, i.e. in idle state, they change from solid into liquid state when shear stress is applied. This particular feature provides a combination of major advantages to gelled propellants for use in liquid and solid propellants.
Developing such highly performing and advantageous propellants requires comprehensive research. We have a physical-chemical laboratory to analyse rheological and physical features of gelled propellants, like viscosity and surface tension. The special rheological and physical features of gelled propellants may differ significantly from conventional liquid fuels in terms of fuel conditioning (vaporisation and injection) in the combustion chamber. While certain gelled propellants show rather similar vaporisation behaviour compared to traditional liquid fuels, others may react with entirely different vaporisation images. This is why we carry out detailed vaporisation tests in separate experimental structures.
The application of gelled propellants is tested in modular model combustion chambers at test complex M11; the gathered data are used to identify appropriate combustion chamber processes and to evaluate the performance characteristics of such propulsions.