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http://dx.doi.org/10.15435/JILASSKR.2019.24.1.1

Study on Spray Atomization Characteristics Depending on the Operating Parameters of Urea Injector  

Kim, Donghwan (한양대학교 대학원 융합기계공학과)
Park, Junkyu (한양대학교 부설 산업과학연구소)
Park, Sungwook (한양대학교 기계공학부)
Publication Information
Journal of ILASS-Korea / v.24, no.1, 2019 , pp. 1-7 More about this Journal
Abstract
This study was carried out to analyze the spray characteristics as a function of the operating parameters of urea injector used in Urea-SCR system of passenger diesel vehicle. Spray visualization and PDPA experiment were performed to analyze the macroscopic spray development and atomization performance of urea-water-solution. For the urea injector, the deformation of the spray head does not appear to be significant because it operates at a low pressure conditions, and the liquid core and primary droplet are observed throughout the operating conditions. No increase in atomization is seen when the operating pressure is increased, and the spray develops linearly due to poor atomization characteristics. The macroscopic spray behavior of the low-pressure urea injector is predictable through the modification of the Hiroyasu equation.
Keywords
Urea-SCR; Urea injector; Spray visualization; Spray characteristics; Droplet size and velocity distribution;
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