High accuracy of diesel simulation over whole operating range
Locomotive diesel D49
Due to the advanced mixture formation and combustion
model, software allows predicting with high accuracy heat release and other parameters of
engines over the whole operating range including low capacity and idling.
For all operating modes the injection profiles have to
be specified. Parameters of injection may be obtained from experimental data as well as
calculated with software for fuel injection system simulation.
Fig. 1 shows diagrams of simulated mixture formation and heat
release rate of medium-speed diesel in locomotive characteristic, including mode of 11 %
capacity.
Preliminary calibration of engine model was carried out with
use of measured data. All following simulation was performed with identical values of all
empirical coefficients.
Different curves of heat release rate (black curves) at each level
of speed and load are presented in right-bottom corner of each
pictures
.jpg)
#1: 11%
#2: 58% #3: 100%
| Fig. 1. |
Diagrams of simulated mixture formation and heat release rate of
medium-speed diesel in locomotive characteristic |
Click number of picture to enlarge it and start
visualization.
Experimental data was presented by Kolomna plant.
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