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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

         2V9DG Locom charact (pic FSV).jpg (57586 bytes)
               #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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