Three-Dimensional Modeling of Soot and NO in a Direct-injection Diesel Engine

1995 ◽  
Author(s):  
Z.-X. Hou ◽  
J. Abraham
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Three Dimensional ◽  
Direct Injection Diesel Engine ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling

Modelling of Spray–Swirl Interaction in Direct Injection Diesel Engine Combustion Chambers

1985 ◽  
Vol 199 (3) ◽  
pp. 187-198 ◽  
Author(s):  
P S Mehta ◽  
A K Gupta
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Direct Injection ◽  
Three Dimensional ◽  
Combustion Chambers ◽  
Direct Injection Diesel Engine ◽  
Wide Range ◽  
Engine Combustion ◽  
Computation Scheme ◽  
Good Agreement

A mathematical model for predicting spray–swirl interaction in a direct injection diesel engine combustion chamber is developed using centre-line velocity vector/continuum approach. The model has three-dimensional features in fuel spray motion. The present model responds to the various air swirl, fuel injection and cylinder charge conditions. The predicted results are compared with the analytical and experimental data available from various sources in the two-dimensional case. Very good agreement is achieved over a wide range of data. The three-dimensional predictions are directly possible without any alteration in the computation scheme.

scholarly journals Modeling the effect of spray/wall impingement on combustion process and emission of DI diesel engine

2009 ◽  
Vol 13 (3) ◽  
pp. 23-33 ◽  
Author(s):  
Samad Jafarmadar ◽  
Shram Khalilarya ◽  
Sina Shafee ◽  
Ramin Barzegar
Keyword(s):  
Diesel Engine ◽  
Film Formation ◽  
Direct Injection ◽  
Combustion Process ◽  
Three Dimensional ◽  
Three Dimensional Modeling ◽  
Wall Film ◽  
Wall Impingement ◽  
Di Diesel Engine ◽  
Fuel Mixing

This work is presented to study the effect of spray impinging on the combustion process and emissions in a direct injection diesel engine at various engine speeds. Computations are carried out using a three-dimensional modeling for sprays, spray-wall interactions, flow field, emission, and combustion process. Results indicate an increase in engine speed leads to increased spray impinging (wall film formation), turbulence intensity and average wall temperature in cylinder. The enhanced air/fuel mixing and intensified evaporation of wall film decreases soot emission by reducing the extent of the fuel rich regions specially in impinging zones. Also at higher engine speeds, combustion is delayed and fuel is consumed in a shorter time period by the enhanced air and fuel mixing. The shorter combustion duration provides less available time for soot and NOx formations. However, only a few attempts have been made to address the effect of impingement of spray with piston walls on the emissions and combustion process. The results of model in addition to approving the corresponding data in the literature are also compared with the experimental data and shown good agreement.

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