Modeling Combustion Chamber Dynamics of Impinging Stream Vortex Engines Fueled With Hydrazine-Alternative Hypergols

摘要

To advance the development of Impinging Stream Vortex Engines (ISVEs) for tactical missile propulsion system applications, a computational fluid dynamics (CFD) modeling capability has been developed and employed to simulate the combustion chamber dynamics of various ISVE designs. Simulations of firstgeneration ISVE configurations fueled with monomethylhydrazine/ red fuming nitric acid (MMH/RFNA) led to insights that inspired a combustion chamber design change, and simulations of an ISVE with the new feature validate its benefits. The CFD model has also been adapted to simulate the dynamics of ISVEs which incorporate a valving concept that is being developed to facilitate start-up and throttling. Additionally, because the risk to Soldier health posed by MMH is now considered unacceptable, the fuel upon which ISVE development program is currently predicated is a TMEDA-DMAZ blend. Toward modeling ISVEs fueled with this blend, a full, detailed chemical kinetics mechanism for TMEDA- DMAZ/RFNA systems was developed based on computational chemistry techniques and validated by reference to experimental data.