| The combustion of a liquid fuel within a highly porous ceramic burner is investigated numerically and experimentally. A detailed numerical model that includes droplet vaporization, convection between the solid and the gas, convection between the droplets and the gas, conduction through both the gas and the porous ceramics, solid radiation, and detailed, multi-step chemical kinetics is developed to simulate and study the phenomena. The solid radiation is modeled by a nongray anisotropic scattering model. The radiation absorption of the vaporizing droplets is also considered. A detailed chemical kinetic mechanism which includes NO;A burner that allows effective control of the equivalence ratio and the burning rate is built to study the phenomena. A highly porous reticulated matrix of partially stabilized zirconia (PSZ) is used as the burner material. The liquid fuel is atomized by using an air blast nozzle. Burning rates, temperature, and CO and NO/NO;Numerical results are obtained for droplet size and temperature history as well as the flame speed, CO and NO/NO... |
