UREA USING IN PISTON ENGINES’ EXHAUST GASES TREATMENT SYSTEMS
Abstract and keywords
Abstract (English):
Development and updating of systems for internal-combustion engines’ exhaust gases treatment under tightened limits for toxics emissions continues to be an urgent issue. The usage of computational fluid dynamics methods in the design of such systems presents a significant practical value. In this work has been considered and realized a calculation procedure for evaporation and thermal decomposition of urea in SCR-systems based on ANSYS Fluent. The calculated results have been compared with existing experimental data. It has been concluded that the developed calculation procedure can be used for efficiency estimation of SCRsystems for internal-combustion engines’ exhaust gases.

Keywords:
piston engine, exhaust gases, nitrogen oxides, SCR, urea injection, evaporation, thermal decomposition, calculation procedure.
Text

1. Введение
На современном этапе развития двигателестроения вводятся все более ужесточающиеся требования к предельно допустимому уровню выбросов токсичных веществ с отработавшими газами (ОГ) двигателей внутреннего сгорания (ДВС) [1, 2].

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