Computer simulation of the dynamics of heat release in diesel cylinders

Abstract

The relevance of computer mathematical modeling, and processing of initial experimental data for follow-up assessment and analysis of the dynamics of heat release in diesel cylinders is growing every day. The main goal of our research consists in the development of a computer model defining the dynamics of heat release in diesel cylinders when it is running on fuels with different fractional composition, based on the application of the method of the Central Research Diesel Institute by analyzing the experimental data obtained in the form of an indicator diagram. The object of research is the method of processing the obtained experimental indicator diagrams. For this purpose, indicator diagrams of a 4CHN 11.0/12.5 diesel engine of the D-245.5S2 brand were obtained in the nominal mode. To implement the software module, a Java programming procedure was used, including the Java Development Kit where the writing, launching and compilation of Java code took place, the Java Runtime Environment, the Java runtime system, where the software distribution mechanism consisted of an autonomous Java virtual machine, standard Java libraries and tools for configuring it; and the Integrated Development Environment of an integrated development environment, where tools that helped launch, edit, and compile codes that provided thermal characteristics. As a result, an analysis of the available methods for determining the characteristics of the dynamics of diesel heat release was carried out, for the first time an algorithm was developed for performing calculations by the method of the Central Research Diesel Institute and a software module for calculating the characteristics of the dynamics of heat release in diesel cylinders when using fuels of various fractional composition based on experimentally obtained indicator diagrams. The use of the proposed technique and the corresponding software module for processing indicator diagrams, and subsequent analysis of the characteristics of the dynamics of heat release in diesel cylinders provides the required quality of the research results.