Next Article in Journal
Design and Analysis of a Floor Radiant Heating System Based on Energy Substitution Technology
Previous Article in Journal
Modeling Restrained Shrinkage Induced Cracking in Concrete Rings Using the Thick Level Set Approach
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessArticle
Appl. Sci. 2018, 8(4), 490; doi:10.3390/app8040490

Numerical Studies on the Action Mechanism of Combustion Intermediates and Free Radicals on Nitrogen Oxides under Oil-Water Blended Conditions

1,2
,
1,2
,
1,2,* and 1,2
1
State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
2
College of Automotive Engineering, Jilin University, Changchun 130022, China
*
Author to whom correspondence should be addressed.
Received: 5 March 2018 / Revised: 18 March 2018 / Accepted: 21 March 2018 / Published: 23 March 2018
(This article belongs to the Section Chemistry)
View Full-Text   |   Download PDF [57763 KB, uploaded 23 March 2018]   |  

Abstract

The action mechanism of combustion intermediates and free radicals on nitrogen oxides have been evaluated. Based on chemical reaction dynamics and modern statistical theory, the subject was investigated by means of numerical simulation. A wide water/oil ratio and a wide air/fuel ratio were also taken into account. Some main conclusions were drawn that the reaction response of H2O2 is lagged behind, with the increase of water mass fraction from 10% to 30%. The maximum generation rate is 2.77%, 5.67%, 8.38% and the maximum consumption rate is 3.55%, 6.80%, 13.01% lower than that without water. Water addition leads to decline of the maximum generation rate of NO, N2O, NO2 by 15.24%, 9.21%, 14.78% on average. Further, the saliency factor is explored in the main reaction process depending on the correlation analysis and the sensitivity analysis method. According to the degree of the significance, OH > O > H2 for NO, O > H2 > OH > HO2 for N2O, and OH > H2 > O > H2O2 > HO2 for NO2. In the case of oil-water blended, H + O2 <=> O + OH and H2O2(+M) <=> 2OH(+M) promote the generation of OH and O at the beginning of the second stage, but H + O2(+M) <=> HO2(+M), HO2 + OH <=> H2O + O2, H2O2 + OH <=> H2O + HO2 play an inhibitory role in the generation of OH and O. View Full-Text
Keywords: chemical reaction dynamics; oil-water blended; nitrogen oxides; Spearman rank correlation; sensitivity analysis chemical reaction dynamics; oil-water blended; nitrogen oxides; Spearman rank correlation; sensitivity analysis
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Yu, X.; He, F.; Du, Y.; Guo, Z. Numerical Studies on the Action Mechanism of Combustion Intermediates and Free Radicals on Nitrogen Oxides under Oil-Water Blended Conditions. Appl. Sci. 2018, 8, 490.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top