Numerical modeling of distributed combustion without air dilution in a novel ultra-low emission turbulent swirl burner

Distributed combustion, often associated with the low-oxygen condition, offers ultra-low NOX emission. However, it was recently achieved without combustion air dilution or internal flue gas recirculation, using a distinct approach called Mixture Temperature-Controlled combustion. Here, fuel-air stream is cooled at inlet to delay ignition and hence foster homogeneous mixture formation. The aim of this numerical study aims understand operation concept better present robust framework for distributed modeling in parameter range where such not predicted before by any existing theory. Further, liquid fuel evaluated that brings additional complexity. Four operating conditions were presented which observed. reacting flow modeled Flamelet-Generated Manifold, based on detailed n-dodecane mechanism. Zimont turbulent flame speed model used significantly reduced coefficients achieve droplets airblast atomization tracked Lagrangian frame. results validated Schlieren images acoustic spectra. It concluded reactant ratio remained below 0.25 through chamber, revealing principal reason excellent stability emission significant recirculation. potential applications these are boilers, furnaces, turbines.