TU Darmstadt / ULB / TUprints

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

Schmidt, Anna ; Bonarens, Matthias ; Roisman, Ilia V. ; Nishad, Kaushal ; Sadiki, Amsini ; Dreizler, Andreas ; Hussong, Jeanette ; Wagner, Steven (2022):
Experimental Investigation of AdBlue Film Formation in a Generic SCR Test Bench and Numerical Analysis Using LES. (Publisher's Version)
In: Applied Sciences, 11 (15), MDPI, e-ISSN 2076-3417,
DOI: 10.26083/tuprints-00021142,
[Article]

[img] Text
applsci-11-06907-v2.pdf
Available under: CC BY 4.0 International - Creative Commons, Attribution.

Download (5MB)
Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Experimental Investigation of AdBlue Film Formation in a Generic SCR Test Bench and Numerical Analysis Using LES
Language: English
Abstract:

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

Journal or Publication Title: Applied Sciences
Volume of the journal: 11
Issue Number: 15
Place of Publication: Darmstadt
Publisher: MDPI
Collation: 19 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Institute for Energy and Power Plant Technology (EKT)
16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA)
16 Department of Mechanical Engineering > Institute of Reactive Flows and Diagnostics (RSM)
Date Deposited: 14 Apr 2022 12:15
Last Modified: 23 Aug 2022 07:03
DOI: 10.26083/tuprints-00021142
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-211429
Additional Information:

Keywords: film thickness; selective catalytic reduction; laser diagnostic; spectroscopy; spray-wall interaction; LES; evaporation; urea decomposition

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21142
PPN: 493435212
Export:
Actions (login required)
View Item View Item