A computational investigation into the combustion byproducts of a liquid monopropellant

作者：Fuller, Mark E; West, Richard H; Goldsmith, C Franklin^*

来源：Proceedings of the Combustion Institute, 2019, 37(4): 5671-5677.

DOI：10.1016/j.proci.2018.05.175

• Monopropellants
• Nitrogen chemistry
• Automatic mechanism generation
• Chemical kinetics

A detailed chemical kinetic mechanism is developed for the gas-phase combustion of a liquid monopropellant, which is a blend of propylene-glycol-dinitrate, dibutyl-sebacate, and 2-nitro-diphenylamine (Otto Fuel II). The combustor is modeled as a steady-state burner-stabilized flame. The simulations reveal that not all of the dibutyl-sebacate is consumed in the flame, with approximately 5% persisting in the post-flame region. A large class of combustion byproducts are formed that have boiling points above the post-flame temperature and thus would be expected to condense out along the length of the combustor. This post-flame, two-phase behavior is hypothesized to be the cause of empirically observed oily build-up within the engine. This work represents a novel advancement in predictive modeling for propellant design, as it provides mechanistic insight into the possible origins of engine fouling.

• 出版日期2019
• 单位东北大学