This work numerically studies the effects of inlet air and fuel turbulators on the thermal behavior of a combustor burning the jet propulsion (JP) (kerosene-surrogate) fuel and its resulting pollutants emission including the nanoparticulate soot aerosols and aromatic compounds. To model the soot formation, the method employs a semi-empirical two-equation model, in which the transport equations for soot mass fraction and soot number density are solved considering soot nanoparticles evolutionary process. The soot nucleation is described using the phenyl route in which the soot is formed from the polycyclic aromatic hydrocarbons. Incorporating a detailed chemical mechanism described by 200 species and 6907 elementary reactions, the flamelets and their lookup table library are precomputed and used in the context of steady laminar flamelet model (SLFM). Thus, the current finite-volume method solves the transport equations for the mean mixture fraction and its variance and considers the chemistry–turbulence interaction using the presumed-shape probability density functions (PDFs). To validate the utilized models, a benchmark combustor is first simulated, and the results are compared with the measurements. Second, the numerical method is used to investigate the effects of embedding different inflow turbulators on the resulting flame structure and the combustor pollutants emission. The chosen turbulators produce mild to severe turbulence intensity (TI) effects at the air and fuel inlets. Generally, the results of current study indicate that the use of suitable turbulators can considerably affect the thermal behavior of a JP-fueled combustor. Additionally, it also reduces the combustor polycyclic aromatic hydrocarbon (PAH) pollutants emission.
Issue Section:
Combustion and Reactive Flows
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