Time-Resolved Analysis of Soot Formation and Oxidation in a Direct-Injection Diesel Engine for Different EGR-Rates by an Extinction Method

1995 ◽  
Author(s):  
Werner Hentschel ◽  
Jens-Uwe Richter
Keyword(s):  
Diesel Engine ◽  
Soot Formation ◽  
Direct Injection ◽  
Time Resolved ◽  
Direct Injection Diesel Engine

Numerical Modeling of Combustion Processes and Pollutants Formation in Direct Injection Diesel Engine

2002 ◽  
Author(s):  
Hoo-Joong Kim ◽  
Nam-Il Heo ◽  
Yong-Mo Kim ◽  
Sung-Mo Kang ◽  
Jae-Hyun Ahn
Keyword(s):  
Numerical Modeling ◽  
Diesel Engine ◽  
Soot Formation ◽  
Direct Injection ◽  
Numerical Results ◽  
Nox Formation ◽  
Temperature Oxidation ◽  
Pollutant Formation ◽  
Direct Injection Diesel Engine ◽  
Combustion Processes

The Representative Interactive Flamelet (RIF) concept has been applied to numerically simulate the combustion processes and pollutant formation in the direct injection diesel engine. Due to the ability for interactively describing the transient behaviors of local flame structures with CFD solver, the RIF concept has the capabilities to predict the auto-ignition and subsequent flame propagation in the diesel engine combustion chamber as well as to effectively account for the detailed mechanisms of soot formation, NOx formation including thermal NO path, prompt and nitrous NOx formation, and reburning process. Special emphasis is given to the turbulent combustion model which properly accounts for vaporization effects on the mixture fraction fluctuations and the pdf model. The results of numerical modeling using the RIF concept are compared with experimental data and with numerical results of the commonly applied procedure which the low-temperature and high-temperature oxidation processes are represented by the Shell ignition model and the eddy dissipation model, respectively. Numerical results indicate that the RIF approach including the vaporization effect on turbulent spray combustion process successfully predicts the ignition delay time and location as well as the pollutant formation.

Modelling Spatial Radiative Heat Flux Distribution in a Direct Injection Diesel Engine

1994 ◽  
Vol 208 (4) ◽  
pp. 275-283 ◽  
Author(s):  
C S Cheung ◽  
C W Leung ◽  
T P Leung
Keyword(s):  
Heat Flux ◽  
Spatial Distribution ◽  
Diesel Engine ◽  
Radiative Heat ◽  
Soot Formation ◽  
Direct Injection ◽  
Radiative Heat Flux ◽  
Experimental Investigations ◽  
Rate Data ◽  
Direct Injection Diesel Engine

In this paper, the spatial distribution of radiative heat flux from a luminous flame to various positions on the cylinder head of a direct injection diesel engine is modelled and the results compared with some published experimental investigations. The model is primarily based on measured pressure data, which are converted into fuel-burned rate data through a single-zone heat-release rate analysis. Coupled with appropriate soot formation and oxidation models, the fuel-burned rate data are converted into the soot contents in the cylinder. By separating the combustion chamber into a burned zone and an unburned zone, the radiation temperature, the absorption coefficient and the spatial distribution of radiative heat flux to the cylinder walls are calculated.

SPRAY CHARACTERISTICS IN A DIRECT-INJECTION DIESEL ENGINE

1996 ◽  
Vol 6 (1) ◽  
pp. 95-109 ◽  
Author(s):  
H. C. Yang ◽  
Hong Sun Ryou ◽  
Y. T. Jeong ◽  
Young Ki Choi
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Spray Characteristics ◽  
Direct Injection Diesel Engine

scholarly journals Effects of pilot injection timing and EGR on a modern V6 common rail direct injection diesel engine

2013 ◽  
Vol 50 ◽  
pp. 012008 ◽  
Author(s):  
Nik Rosli Abdullah ◽  
Rizalman Mamat ◽  
Miroslaw L Wyszynski ◽  
Anthanasios Tsolakis ◽  
Hongming Xu
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Common Rail ◽  
Injection Timing ◽  
Pilot Injection ◽  
Direct Injection Diesel Engine
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