Input data list of applied software DIESEL-2/4t

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OVERALL  DESIGN

   The list includes data which are necessary for calculation of the combined internal combustion engine and its units: turbines, compressors, air coolers, speed-reducers of turbo-compressors, additional combustion chamber, etc.
   There are not included in the list: the data for calculation of the performances of the combined engine; the data for realization of complex optimization and the data for set-up of mathematical model. These data are not necessary for the first acquaintance with the program.
   The code DIESEL-2/4t allows to carry out the calculation of any scheme of a turbocharging including two-stage: with a speed-reducer of some stage and free. The maximum amount of data is required for such calculation which will carry out the coordination of the characteristics of the engine, turbines, compressors and air coolers.
   The pre-processor of the code automatically offers only those data which are necessary for a chosen configuration of calculation. The present document has not functions of the pre-processor therefore the list of input data can seem too large, especially, the list of data for turbocharging units. The minimum data set is required for calculation of an engine when the characteristics of turbines and compressors are not taken into account. The parameters of supercharging can be set directly or calculated as functions of pressure ratio and efficiency of compressor. The pressure of gas in front of   turbine can be set directly or calculated by solution of equation of capacity balance between a turbine and compressor. In the latter the turbocharger efficiency must be set.

Input data are grouped together according to main systems of an engine.

1.  GENERAL PARAMETERS

2.   TYPE OF ENGINE,  COMBUSTION CHAMBER DESIGN,  FUEL INJECTION EQUIPMENT

3.  GAS EXCHANGE SYSTEM

4.  UNITS OF TURBOCHARGING

     The calculation of engines with different systems of supercharging including two-step turbocharging with inter cooling, system Hyperbar, etc. can be carried out by code DIESEL - 2/4t.
     The calculation can be carried out on given parameters of gas after the compressor and in front of the turbine or by the coordination of characteristics of all units.
     The characteristics of turbines and compressors can be imported from text files or obtained as a result of gas-dynamic calculation of a gas flow of these units.
     Below lists of the initial data contains the maximum data set. The pre-processor chooses only necessary data for the elected scheme of calculation. For example: the efficiency and the pressure ratio of the turbine and compressor are not needful for calculation of characteristics curves of these units. Pressure ratio and efficiency are defined in each point by means of gas-dynamic calculation of flow in view of losses under different attack angles.

     -  TURBINES

     -  COMPRESSORS,   AIR COOLERS  AND  SPEED-REDUCERS

5.  OPERATING REGIME OF THE ENGINE

Gas SI engine

System of gas bypassing and additional combustion chamber

Ambient parameters

FIXED PARAMETERS OF THE REGIME OF THE TURBO-COMPRESSOR

 

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