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Applications of  DIESEL-RK

     DIESEL software has been designed since 1981 - 1982. In those years it was applied in researches of many engines with different sizes, speed and application. All these years the software is  improving to grow efficiency and field of application. Results of simulation in every research are compared with experimental data obtained by various authors, mainly obtained by diesels manufacturers.

     Main features of program DIESEL-RK are similar to known thermodynamic programs. However, together with conventional features, the DIESEL-RK has new advanced applications which are absent in other programs. DIESEL-RK is oriented on diesel combustion optimization and ICE analysis and optimization. The assumption about identical work of all engine cylinders allows considerably increase operating speed and one makes it possible to resolve multiparametrical optimization tasks.

    Main Applications

  • Torque curve and other engine performances prediction.
  • Fuel consumption prediction and optimization.
  • Combustion and emission analysis and optimization.
  • Knock prediction.
  • Valve timing optimization.
  • EGR system analysis and optimization.
  • Turbocharger and bypasses matching and optimization.
  • Research and optimization of fuel injection profile including multiple injection, sprayer design and location as well as piston bowl shape optimization.
  • Convert of diesel engines into gas engines.
  • Dual fuel engine analysis.

     High operating speed of DIESEL-RK permit resolving of multiparametrical optimization tasks, including optimization of piston bowl shape and fuel injection system to achieve low level of NO and smoke emissions.

      Computational researches with optimization can be carried out very fast and without large expenditures. The software does not require powerful computer.
      After termination of computing, data about fuel sprays evolution including interaction of them are presented in a convenient form. It allows step by step caring out optimal design of piston bowl and sprayer to achieve optimal conditions of sprays evolution with minimal losses due to intersection of free sprays and  wall surface flows generated by sprays.

Example of sprays evolution simulation.
See details in >>

     Some examples of researches and obtained results are presented below.

Simulation of the medium speed diesel engine which is equipped with two independent fuel supply systems was carried out and results are presented in the paper. Methanol injected by the system B is used as main fuel which is ignited with the pilot injection of Diesel Oil supplied by the system A. Configurations of both fuel systems are presented in the paper as example of DIESEL-RK interface.

Optimization of medium speed diesel engine parameters to meet the 2012 EU Stage IIIB regulations. 

The research includes common optimization of the following parameters:
  - Intake Valve Timing (Miller cycle);
  - Injector holes number, diameter, and orientation;
  - EGR (with the account of a Venturi nozzle dimensions and power for EGR pump drive...);
  - Injection pressure;
  - Injection profile shaping;
  - Boost pressure;
  - Compression ratio.
Automatic optimization is carried our at few operating points having own weight coefficients...
 See details >>



Matching the piston bowl shape and spray angle for the locomotive diesel.
Computational research and optimization of sprayer nozzles orientation for different piston bowl shapes has been performed. Analysis of fuel sprays evolution in contact with walls as well as distribution of fuel in characteristic zones has been done for part load and full capacity. Conclusion about dependence of optimal piston bowl shape on BMEP was made. See details>>

Simulation of mixture formation, combustion and NO emission in truck diesel with different strategies of injection. Examples of simulation of mixture formation, combustion and NO emission in one-cylinder truck diesel equipped with Common Rail fuel injection system are presented in comparison with experimental data. See details>>


Simulation of mixture formation and combustion in two-stroke marine diesel with side injection system.
An example of simulation of mixture formation, fuel distribution and combustion in cylinder of low-speed marine diesel is presented. Fuel sprays tip penetration (in swirled air) were calculated and compared with experiment and with calculated by CFD software. See details>>


Development of Common Rail system controlling algorithm. 
At first, simulation of high speed diesel with Bosch VE fuel system was carried out over whole operating range (with identical empirical coefficients). Calculated data are well corresponded with experimental ones. Next step: at several operating modes the optimization of injection parameters of Common Rail system was carried out to decrease NO and PM emission. On a base of optimal solutions a map of injection pressure, injection duration and injection timing was obtained for the whole operating range. See details>>   




Simulation of medium-speed diesel combustion at split injection.
An example of simulation of mixture formation and combustion in cylinder of medium speed locomotive diesel with double stage injection is presented. Heat release rate curves obtained in calculation and in testing are compared. See details>>


Simulation of diesels over the whole operating range. 
After calibration of ICE model, DIESEL-RK provides accuracy simulation of engine over whole operating range. Images of mixture formation and heat release diagrams are presented for different operating modes of:
- high-speed diesel. See details>>
- truck diesel YaMZ-238D. See details>>
- medium speed locomotive diesel. See details >>


Simulation of gas exchange and combustion of truck diesel at different operating modes.
Calculated and measured diagrams of heat release rate and pressures in cylinder and manifolds are compared at different operating modes. Image of mixture formation and analysis of allocation of fuel in characteristic zones are presented for full load.  See details >>


Analysis of allocation of injected fuel in characteristic zones of combustion chamber for diesel engines with different conditions of a mixture formation. See details >>

 



Calculation of a gas pre-chamber engine (diesel MTU 396 converted for operation on natural gas). Comparison between calculated and experimental curves of pressure in the cylinder and diagrams of prechamber pressure and temperature are presented.  
See details>>

 


Research aimed to decrease NO emission of naturally aspirated diesel.
Numerical research of possibility to decrease a level of NOx emission of diesel engine by means of optimization of the piston bowl shape, by veering of fuel jets evolution, by decrease of injector nozzles diameter, by increase of  compression ratio, etc. A sequence of optimization steps and theirs results are presented.  See details >>

Multiparametrical optimization of a medium-speed marine diesel at increase its capacity. Research aimed to achieve minimal SFC at increase engine power by a factor 25%. Optimization parameters include designed angles of HP and LP turbines nozzles outlet of two-stage free turbocharger, valve timing, CR, etc.  A sequence of optimization steps and theirs results are presented. See details >>

 

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