Experimental Investigation of AdBlue Film Formation in a Generic SCR Test Bench and Numerical Analysis Using LES

In this work, an experimental investigation of AdBlue film formation in a generic selective catalytic reduction (SCR) exhaust gas test bench is presented. injected into SCR resulting liquid on the lower wall channel. The thickness measured using sensor based absorption spectroscopy. Simultaneously, temperature at measurement point monitored, which allows for examining correlations between evolution and wetted wall. velocity airflow channel initial are varied experiments. Correspondingly, measurements performed during different thermodynamic regimes, including deposition boiling. Repeated have also shown that thicknesses reproducible with standard deviation 3.4 %. LES-based numerical simulations compared to results early injection stage. Finally, analysis analyze droplet impingement subsequent film-formation dynamics.