Effects of n-Butanol Addition on the Combustion Characteristics of n-Heptane Counterflow Diffusion Flame at Elevated Pressure

This study focused on the effects of n-butanol addition combustion characteristics n-heptane counterflow diffusion flame under pressures 1, 3, and 5 atm by a detailed kinetic simulation. The added volume fraction ranged from 0 to 50%. mass averaged velocity fuel streams was selected ensure momentum flux balance approximately constant for investigated flames. Flame structures mole profiles impacted major species, free radicals, intermediate species were analyzed concentrating formations soot precursors oxygenated air pollutants. results showed that with n-butanol, temperature decreased formation main such as C2H2 C6H6 inhibited. can be attributed reduced rate production these species. increased significantly, profile moved towards side increasing pressure. Moreover, observably promoted pressure increased. concentrations radical H, O, OH significantly but slightly addition, which might have been caused chemical effect n-butanol.