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http://dx.doi.org/10.3795/KSME-B.2014.38.1.041

Numerical Investigation of the Spray Behavior and Flow Characteristics of Urea-Water Solution Injected into Diesel Exhaust Pipe  

An, Tae Hyun (Dept. of Aerospace Engineering, Chonbuk Nat'l Univ.)
Kim, Man Young (Dept. of Aerospace Engineering, Chonbuk Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.38, no.1, 2014 , pp. 41-48 More about this Journal
Abstract
A urea-SCR system suffers from some issues associated with the ammonia slip phenomenon, which mainly occurs because of the shortage of evaporation and thermolysis time, and this makes it difficult to achieve an uniform distribution of injected urea. A numerical study was therefore performed by changing such various parameters as installed injector angle and application and angle of mixer to enhance evaporation and the mixing of urea water solution with exhaust gases. As a result, various parameters were found to affect the evaporation and mixing characteristics between exhaust gas and urea water solution, and their optimization is required. Finally, useful guidelines were suggested to achieve the optimum design of a urea-SCR injection system for improving the DeNOx performance and reducing ammonia slip.
Keywords
SCR(Selective Catalytic Reduction); Urea-water solution; Evaporation; Thermolysis; NOx(Nitrogen Oxides); Ammonia; Mixer;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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