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The mathematical model of the processes in the diesel engine combustion chamber under cold start conditions has been developed. The model takes into account the influence of the fuel inlet air heater on these processes and allows determining the ignition lag and the heat release rate characteristics depending on the combustion products concentration. The program class, based on the mathematical model, was developed using Modelica language, which describes the processes in the diesel engine combustion chamber and is embedded in the program for simulation of the engine as a whole. Using the developed mathematical model and program, the limit values for the combustion products concentration and the maximum compression temperature, at which the diesel engine can start under given conditions, were established. The comparison of the diesel engine parameters with a fuel and electric intake air heater at cold start modes is performed.
A. Malozemov; M. Solomonenko. Diesel Engine Cold Start Simulation with an Inlet Air Heater Using Modelica Language. Recent Advances in Computational Mechanics and Simulations 2021, 573 -580.
AMA StyleA. Malozemov, M. Solomonenko. Diesel Engine Cold Start Simulation with an Inlet Air Heater Using Modelica Language. Recent Advances in Computational Mechanics and Simulations. 2021; ():573-580.
Chicago/Turabian StyleA. Malozemov; M. Solomonenko. 2021. "Diesel Engine Cold Start Simulation with an Inlet Air Heater Using Modelica Language." Recent Advances in Computational Mechanics and Simulations , no. : 573-580.
The article presents the results of software development, using the Modelica language, designed to create and use simulation models as part of reciprocating internal combustion engines digital twins. The software was created on the basis of component, system and declarative approaches, the theory of a casual bond graphs. The software includes submodels for determining the main engine parts wear rate and allows to predict engine parts life time, to simulate normal and accelerated engine reliability and durability tests. In the course of the study, the well-known model for determining mechanical frictional losses SLM (Shayler, Leong, Murphy, 2005) was adapted to calculate the relative change in the wear rate of engine parts. Universal equations are obtained to determine the friction forces as applied to rotationally and reciprocally moving engine parts. A method is proposed for calculating the relative change in the wear rate of parts and the time of failure due to wear, taking into account the physical properties (hardness), geometric dimensions and the speed of the relative movement of parts in the conjunction.
A A Malozemov; D V Kozminykh; A V Shavlov. Simulation model for predicting reciprocating internal combustion engine wear. IOP Conference Series: Materials Science and Engineering 2021, 1047, 012010 .
AMA StyleA A Malozemov, D V Kozminykh, A V Shavlov. Simulation model for predicting reciprocating internal combustion engine wear. IOP Conference Series: Materials Science and Engineering. 2021; 1047 (1):012010.
Chicago/Turabian StyleA A Malozemov; D V Kozminykh; A V Shavlov. 2021. "Simulation model for predicting reciprocating internal combustion engine wear." IOP Conference Series: Materials Science and Engineering 1047, no. 1: 012010.
The article presents the results of a study aimed at creating a mathematical model of thermodynamic processes in the intake manifold of a forced diesel engine, taking into account the features of simultaneous injection of fuel and water into the collector. In the course of the study, the tasks of developing a mathematical model were solved, it was implemented in the existing software for component simulation “Internal combustion engine research and development” (ICE RnD), created using the Modelica language, and verification was undertaken using the results of bench tests of diesel engines with injection fuel and water into the intake manifold. The mathematical model is based on a system of equations for the energy and mass balances of gases and includes detailed mathematical submodels of the processes of simultaneous evaporation of fuel and water in the intake manifold; it takes into account the effect of the evaporation of fuel and water on the parameters of the gas state in the intake manifold; it takes into account the influence of the state parameters of the working fluid in the intake manifold on the physical characteristics of fuel and water; it meets the principles of component modeling, since it does not contain parameters that are not related to the simulated component; it describes the process of simultaneous transfer of vapors and non-evaporated liquids between components; and it does not include empirical relationships requiring data on the dynamics of fuel evaporation under reference conditions. According to the results of a full-scale experiment, the adequacy of the mathematical model developed was confirmed. This model can be used to determine the rational design parameters of the fuel and water injection system, the adjusting parameters of the forced diesel engine that provide the required power, and economic indicators, taking into account the limitations on the magnitude of the mechanical and thermal loads of its parts.
Vladimir Bondar; Sergei Aliukov; Andrey Malozemov; Arkaprava Das. Mathematical Model of Thermodynamic Processes in the Intake Manifold of a Diesel Engine with Fuel and Water Injection. Energies 2020, 13, 4315 .
AMA StyleVladimir Bondar, Sergei Aliukov, Andrey Malozemov, Arkaprava Das. Mathematical Model of Thermodynamic Processes in the Intake Manifold of a Diesel Engine with Fuel and Water Injection. Energies. 2020; 13 (17):4315.
Chicago/Turabian StyleVladimir Bondar; Sergei Aliukov; Andrey Malozemov; Arkaprava Das. 2020. "Mathematical Model of Thermodynamic Processes in the Intake Manifold of a Diesel Engine with Fuel and Water Injection." Energies 13, no. 17: 4315.