Numerical Simulation of the Nitrogen-Enriched Air Combustion and Emission in Diesel Engine

Abstract:

Combustion intermediate products in nitrogen-enriched intake air (NEA), such as CH2O and H₂O₂, are researched in this paper with chemical reaction kinetics software. Besides that, combustion of n-Heptane in NEA at different intake temperature and different rotate speed are researched. Nitrogen-enriched air combustion process in diesel engine is simulated with CAE software. The temperature trace peak and NO_x emission at NEA and different rotate speed are studied in this paper. The increment of nitrogen in the intake air greatly impacts on the n-Heptane combustion intermediate products CH2O and H₂O₂; and the results show that the nitrogen is of fire-retardant properties. The peak-cylinder combustion pressure and the relative pressure-increase rate will decrease with the increment of nitrogen in intake air when the temperature is higher than certain value. NO_x emissions decrease with the increment of nitrogen in intake air.

• Periodical: Applied Mechanics and Materials (Volumes 220-223)
• Pages: 830-835
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.220-223.830
• Online since: November 2012
• Authors: Ying Ai Jin, Feng Qin Huang, Qing Gao
• Keywords: Combustion in Nitrogen-Enriched Air, Diesel Engine, NO_x Emission, Simulation

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