Schlieren and Mie scattering techniques for the ECN “spray G” characterization and 3D CFD model validation

摘要: Purpose This paper aims to study the heat transfer phenomenon occurring between heated walls and impinging fuel, showing strict relationship cooling effect after impingement enhancing of wallfilm formation. The focuses on a fundamental task in terms pollutant emissions internal combustion engines, aiming at giving major contribution optimization energy conversion systems environmental impact. Design/methodology/approach The is based experimental campaigns relevant taking measurements an spray over wall confined vessel. results, both qualitative quantitative (measurements liquid vapour radial penetration thickness), are numerically reproduced by computational model Reynolds Averaged Navier Stokes approach, properly validated through customized sub-models. Findings The provides results about agreement thickness simulation, achieved into account determined fuel impingement. This validation numerical allows author give more considerations link temperature formation. Originality/value This presents original approach for simulation transfer, imposing boundary condition that may consider conduction given lateral normal directions. classical Dirichlet condition, characterized fixed value, is, instead, replaced calculating unsteady process couples fluxes fluid solid material within itself.