Solid-Gas Interface Analyses for High Energy Density Fuels Combustion

摘要

New hydrocarbon fuels with high energy-density content can substantially advance high-thrust, high-temperature, and reduced-size combustion technology. In the present work, the phase change dynamics of the PCU alkene dimer, a newly synthesized high energy-density hydrocarbon fuel, in turbulent reacting flows has been investigated. The shape, location and velocity of the propellant-gas interface has been treated explicitly. A Lagrangian moving grid technique in conjunction with an established body-fitted field equation solver has been developed. Due to the complex flow structure and uneven heat flux distribution along the propellant surface, the interface experiences nonuniform regression between the front and the rear ends. Consistent with the experimental observation, the thermal characteristics near the solid-gas interface vary in space and in time. The present computational capability can advance our understanding of phase change, thermal decomposition, and subsequent mixing and burning dynamics of energetic fuels.